Brendan Foody joined this episode as a talk, not an interview: roughly fifteen minutes of prepared material on RL environments, then open Q&A. Foody is the customer-facing executive at Mercor, the agentic-data vendor that the host introduced with a striking number — Mercor grew from a $1 billion to a $2 billion revenue run rate in the four months before recording, i.e., roughly spring–summer 2026. Mercor's customer base spans the frontier labs and, increasingly, application-layer companies: Harvey, Cera, Cognition, and Ramp. Its origin was deep research — Foody calls it "the first prominent RL agent" — and the company has since become the primary vendor of what he terms agentic data to the leading labs.
Foody's central claim: the binding constraint on frontier model usefulness is no longer architecture but the data distribution that teaches agents to use real-world tools. RL environments — high-fidelity worlds, app clones, and verifier-scored tasks — are how labs close that gap, and the technology is now diffusing from the frontier labs to every company building its own intelligence. The episode is dense with concrete anchors: a post-training run on 1,800 tasks for roughly $500K in compute lifted a corporate-law pass rate from 4.7% to 26.6%; 205 Bureau of Labor Statistics domains define the distribution Mercor must cover; 2.5 million expert hours were consumed in Q2 2026 alone. For a finance or technology professional, this is a window into how the data layer of the AI value chain is being priced, industrialized, and productized.
## From crowdsourcing to the agentic era
Foody frames Mercor's market as a story of two eras. In 2020, the data economy was crowdsourced behavior cloning: supervised fine-tuning inputs and outputs, plus RLHF data where an annotator selected preferences between model responses. That paradigm powered fine-tuning of GPT-3 en route to ChatGPT and GPT-4. But heading into 2024, he says, the market underwent a "giant transition" away from low-skilled crowdsourcing and toward what he calls the agentic era:
> "How do we find the highest-skilled experts in the world that can work collaboratively in teams to build frontier evals and RL environments for the next generation of models?"
The relevant labor pool shifted from anonymous annotators to software engineers, lawyers, doctors, and bankers who can measure the frontier of intelligence. Mercor's first big project was deep research, which scaled up alongside the agentic boom and made Mercor the primary data vendor to both frontier labs and the application layer. The host's framing — a doubling of revenue run rate in four months — signals how fast that demand has compounded. Foody's broader point: RL-environment technology that first existed only inside frontier labs is now "getting disseminated to the application layer and all of the products that all of you are building."
## Anatomy of an RL environment: worlds, apps, tasks
An RL environment has three parts, each with a precise job:
- **Worlds** — the artifacts of a real project or company: messages, slides, docs, sheets.
- **Apps** — high-fidelity clones of popular applications (Salesforce, ServiceNow, Microsoft 365, Google Workspace) that agents interact with via MCP, CLI, or similar interfaces.
- **Tasks** — prompts plus verifiers (rubrics or unit tests) usable for either eval or training.
The strategic goal is coverage: "how do they cover the full distribution of all of the worlds, all of the apps, and all of the tasks in the economy." The worked example Foody shows is a legal environment built with lawyers from top firms such as Latham & Watkins. An expert writes a scenario from a real big-law matter, outlines a full data room — emails, files, correspondence — and the system renders that data room into cloned apps. A sample prompt evaluates "the maximum total liability for Star Tanker Tankers International Limited compared to Cooper Jefferies Energy Corporation under the Oil and Petroleum Act." A professor-style rubric then grades model trajectories on key criteria.
```mermaid
flowchart TD
A["Domain experts, lawyers, engineers, doctors, bankers"] --> B["Write outlines, scenarios and data room blueprints"]
B --> C["RL environment"]
C --> D["Worlds, messages, docs, slides, sheets"]
C --> E["App clones, Salesforce, ServiceNow, Microsoft 365"]
C --> F["Tasks, prompts plus verifiers, rubrics or unit tests"]
F --> G["Model trajectories rolled out per task"]
G --> H["Rubric scoring and trajectory analysis"]
H --> I["QC, agentic checks plus human review"]
I --> J["Post-training, e.g. 1,800 tasks at about $500K compute"]
J --> K["Measured gains, e.g. corporate law 4.7% to 26.6%"]
H --> L["Reward-hacking checks, rubric calibrated against human stack-rank"]
```
Why are humans indispensable in most domains? Because a model cannot reliably grade its own output. Clean simulation environments exist for math, which is why math can be learned without human verifiers, but most domains lack that signal:
> "It's as if you would be asking a human to grade their own homework."
Building a verifier is itself hard: a rubric for a slide deck must anticipate the full solution space — the ten different good slide decks a model might produce — and the dozens of plausible mistakes. The quality-control loop is called **trajectory analysis**: roll out roughly ten trajectories of the model being improved, score all of them, then run agentic QC systems plus human review to confirm the scores match what a human stack-rank would have produced.
## The scale-out: from 205 BLS domains to measured post-training gains
The coverage problem is defined by a concrete enumeration: GDP-Value's domain taxonomy draws on 205 domains from the Bureau of Labor Statistics, spanning all jobs. Each domain then needs its own apps, scenarios, and tasks — an enormous combinatorial build-out. Mercor's talent throughput reflects that: 2.5 million expert hours in Q2 2026 alone, with growth accelerating across the preceding 24 months. Foody's point is that humans are needed not for volume but for measurement: only humans can measure the frontier in most domains, and experts also create the outlines that keep environments grounded in "what a real lawyer's environment" actually looks like.
The payoff is visible in a post-training run on the Apex Agents dataset:
| Apex Agents post-training run | Value |
|---|---|
| Model trained | GLM-4.7 (being re-run for Kimi K3) |
| Tasks used | 1,800 |
| Compute spent | ~$500K |
| Corporate law pass rate, before | 4.7% |
| Corporate law pass rate, after | 26.6% |
| Generalization | Nominal gains on GDP-Value and Apex V1, neither of which contains data rooms |
The corporate-law jump is dramatic, but Foody emphasizes the generalization result: training on environments with data rooms improved performance even on benchmarks without them. He also flags a recent shift on the frontier leaderboards: open-weight models GLM-5.2 and Kimi K3 now appear alongside the closed labs. That matters for application companies because it "gives us the foundation to actually achieve frontier intelligence" in specific verticals — frontier-quality open weights lower the floor for anyone building owned intelligence.
## Data as a market: offerings, pricing, and quality
Mercor sells data through three channels, which Foody says he recently articulated with a colleague. He sees these as the main commercial shapes of the market:
| Offering | How it works | Who buys it | Price / scale signals |
|---|---|---|---|
| **By task (custom)** | Customer specifies a data shape — e.g., "environments in law" — and pays per task | Frontier labs; some buy ~50,000 tasks per month | Example price: $2,000/task; a single task can take hours to a month of expert time |
| **Off-the-shelf** | Mercor builds datasets once, sells to multiple customers; hundreds of millions invested in the catalog | Neo labs, which prefer not to duplicate build-outs | Shared cost base; "doesn't make sense for 10 different labs to all be building their own data sets" |
| **Hourly experts** | Mercor supplies experts; the customer organizes the workflow | Early-stage customers; this is how Harvey started (hiring lawyers) | Hourly model; increasingly de-emphasized in favor of scaled data offerings |
Pricing is set two ways. The first is value-based, working backward from the customer's goal — e.g., reaching the frontier on a given leaderboard — and asking how much that outcome is worth and how many tasks get there. Foody's anchor: "a company like Nvidia, they're probably willing to pay, you know, a billion dollars to have a frontier open-source model." The second is cost-based: at roughly $150/hour for expert time and a 10-hour task, the cost basis is about $1,500, and margin is set by how differentiated and frontier the task is. Actual task prices span $50 to $10,000.
Quality, in this market, means two things: **realism** (does the environment reflect the real distribution of work, driven by expert outlines and a granular taxonomy) and **verifier accuracy** (does the rubric score 100 rolled-out trajectories the same way a human stack-rank would). Human preference labels can also be used as an eval for the auto-grader itself. On the build-vs-buy question, Foody's advice is unambiguous: for critical customers Mercor runs siloed, fully exclusive teams so the customer owns the data and keeps the competitive advantage, while still benefiting from the platform's economies of scale. His evidence: the frontier labs themselves contract out rather than build talent networks in-house, and "that's a pretty good indication" of the structural advantage.
## The learning signal: synthetic data, self-grading limits, and base-model thresholds
A recurring misconception, Foody argues, is what "synthetic data" means in this context. RLVR is itself a bet on synthetic data: instead of human-written SFT examples, labs roll out many synthetic model trajectories, score them, and learn from the scores. Models also play a large role in populating environments — a lawyer building a data room should be orchestrating Claude or ChatGPT, just as a software engineer should orchestrate agents rather than hand-code. But the human remains essential at the measurement step:
> "You need humans almost definitionally to measure what is beyond the frontier of the model capabilities. The models... can't just tell the model 'come up with the legal environment and then tell me which of your legal memos are good and bad.' It's super noisy."
Asked whether rubric generation can be scaled with AI, Foody is precise: an AI copilot can make experts dramatically more efficient — it can read trajectories and show where a model goes wrong. But the model being improved (referred to in the transcript by the codename "FABLE") cannot reliably write its own rubric criteria; it gets roughly half right and half wrong, "and that amount of noise is unworkable from a training standpoint." Task creation is therefore the most human-intensive step. There are exceptions: code, where signals are cleaner, and distillation, where a stronger model like Kimi K3 can generate tasks that a weaker model can learn from. Cyber is another partial exception — an attacker/defender agent setup can substitute for human verifiers, with humans still architecting environments for diversity.
Finally, the base model sets the ceiling on whether training can work. The diagnostic is the gap between pass@16 and pass@1: if a model rolls out 16 trajectories and gets all of them wrong, learning is "sort of hopeless." The ideal case is pass@1 failing but pass@16 succeeding once or twice — that sparse positive signal is enough for the model to learn efficiently. Parameter count matters in how trainable the model is, but the pass-rate structure is the practical test.
## What's next: long horizons, virtual co-workers, and owned intelligence
Why did RL environments become the dominant paradigm only in the last year-plus? Foody's explanation is sequential. Deep research came first because it was a lighter environment: search was the tool, and experts mainly wrote rubrics rather than populating apps. The 2025 app boom followed because the primary bottleneck became how models use the context and tools on everyone's laptops — and "if we want this in the user distribution of usage, then we need to get it in the data distribution that the models are learning from."
Two shifts define the next phase. First, **ultra-long horizon tasks**: current agents are trained on tasks under 10 hours; the frontier is building tasks that take a human 100 or even 1,000 hours. Second, **virtual co-workers**. Foody's favorite diagnostic:
> "What percentage of tasks that you do in your job require interacting with other people? Most people would say 60% or 70%. But then if you map that on to what percentage of evals measure how well the models can interact with other people, it's like 1% — maybe τ-bench has a little bit of this."
That, he says, is a "giant realism gap" in how the industry measures agent performance. Finally, the dissemination story: Cursor is the template Andrew (referenced by Foody) cites of an application-layer company building an industry-leading owned model, and Foody expects "dozens of examples just like that over the next 12 months" — through roughly mid-2027. Harvey, which started on Mercor's hourly expert model and now buys domain-specific environments, is the pattern for vertical frontier intelligence.
## What to watch: the data moat in vertical AI
The episode's through-line is that data has become the third pillar of AI strategy — alongside compute and researchers — and arguably the most differentiating one, because the other two are increasingly commoditized. The frontier labs industrialized the measurement loop (experts → environments → trajectories → rubrics → post-training) and are spending on it at a scale of millions of expert hours per quarter; that same loop is now being packaged for the application layer. Three tensions are worth tracking. First, the off-the-shelf business model implies that some data will be shared across competitors — a deliberate commoditization — while the custom, exclusive channel is where moats are sold; buyers need to know which lane they are in. Second, the entry of GLM-5.2 and Kimi K3 onto frontier leaderboards compresses the value of raw model capability and raises the value of proprietary verifiers and environments — good news for vertical companies, deflationary for pure model labs. Third, the biggest unrealized surface is social interaction: if 60–70% of real tasks involve other people and ~1% of evals test for it, the next distributional build-out may matter more than any single benchmark. Watch for Mercor's updated Kimi K3 post-training results on Apex Agents, the first 100-hour-horizon task suites, and any application-layer company that turns a custom data set into a Cursor-like product.
RL environmentsAgentic data marketPost-training modelsExpert data labelingSynthetic data generationData pricing and qualityApplication layer AIFrontier model benchmarksCustom data offeringsVirtual co-workers
In a 62-minute conversation with Mercor CPO Osvald Nitski, recorded eight months after the publication of this briefing, the core finding is that the data training and evaluation market is not threatened by open source model improvements — instead, rising frontier capabilities expand the addressable market for human data. Nitski argues that enterprise AI workflows are nowhere near saturation: the oft-cited "90% of workflows can be handled by open models" statistic conflates existing demand with latent demand. Mercor’s own benchmarks show frontier models only reach ~50% success on long-horizon workflows (e.g., fully autonomous procurement agents that run for months). The remaining uncapped, continuously improvable tasks — legal arguments, medical advice, adversarial cybersecurity — ensure that demand for high-quality eval and training data grows in lockstep with model performance. Nitski directly addresses the elephant in the room: the frontier labs that are Mercor’s largest customers also represent the greatest revenue concentration risk. But he counters that the company’s cash flow is so strong that "we end every week with so much more money in the bank" — and that the strategic imperative is to move downmarket to serve enterprise self-service, diversifying away from lab dependency.
The episode, hosted by a venture investor (not named in transcript), is structured as a rapid-fire exploration of topics that define the AI data supply chain in mid-2026: open source’s competitive dynamics, the real ROI problem (which Nitski says is overblown), the product management transition from tool-driven to judgment-driven, hiring biases toward senior generalists, and the emerging data types — particularly reinforcement-learning environments and robotics — that will define the next wave. Nitski, a Canadian expat who joined Mercor early, embodies the hypergrowth ethos: skeptical of co-sourcing and managed services as permanent structures for AI deployment, he sees them as temporary knowledge-dissemination gaps. The interview also surfaces a sharp critique of VC-subsidized annotation startups and a candid admission of Mercor’s own product mistakes from trying to support too many workflows.
## Open source raises the floor, not the ceiling — and data demand follows
Nitski rejects the premise that open source models cannibalize Mercor’s core business. Data is most valuable at the frontier of model performance, and open models simply increase the baseline of what is feasible at no cost. Enterprises still need specialized, proprietary training and eval sets to differentiate on tasks that matter to their specific business models and customer needs. The "90/10" split often cited by analysts (90% of enterprise workflows handleable by open models) is a misreading of the current state. In Mercor’s *Apex* benchmarks, top models achieve only around 50% success on long-horizon workflows — tasks like setting up a procurement agent that runs unsupervised for months. Many workflows, especially in law and medicine, are inherently unbounded in improvement potential and require continuous data investment.
A key distinction is between *sufficiency-based* tasks (e.g., updating a CRM) and *uncapped-reward* tasks. The latter will always demand high-quality human data. This dynamic means that even if frontier models improve dramatically, the set of things worth doing expands, not contracts.
## Enterprise AI ROI: Not a problem, just a patience phase
Contrary to the narrative of "enterprise ROI questioning" promoted by Alex Karp and others, Nitski sees the current period as one of exploration with high tolerance for uncertain returns. Token prices and performance are still in flux, so enterprises are hesitant to lock in ROI calculations. The real scrutiny is coming from spend optimization within specific use cases, not from a wholesale retreat. He differentiates between growth-stage companies (willing to spend heavily on coding agents and productivity improvements) and companies where token spend directly maps to customer revenue (e.g., customer service agents with high token burn). For the latter, tight unit economics are non-negotiable. Salesforce’s $300 million annual spend on Anthropic (reported as 3.8% of developer salaries) is a data point, but Nitski expects the percentage of spend allocated to AI to increase well beyond that over time, possibly approaching 100% for some hypergrowth firms like Mercor itself.
## The shift in product management: from tool proficiency to business judgment
Nitski describes two major changes in the PM role since the AI era:
1. **Tool diversity is collapsing.** His team is moving away even from Figma in favor of Cloud Design, and coding agents handle most execution. The skill of learning many tools is obsolete.
2. **The bottleneck shifts to judgment and business impact.** PMs must constantly ask: "Am I doing what will drive the most business value?" Execution speed is no longer a differentiator; the critical ability is to set up good experiments, understand statistics, and design systems.
The ratio of PMs to engineers is increasing – Nitski expects fewer engineers per PM as coding agents accelerate delivery. He warns against delegating judgment to AI: "You have to be paranoid with them still." The interview process at Mercor now includes a single take-home that tests AI fluency, followed by whiteboarding sessions on experimental design and systems thinking. The team has biased toward more senior hires (ages 25–35) who can grok business impact quickly, but they avoid "seasoned operators" from large companies who may lack hunger.
A table illustrates how the PM role has changed:
| Area | Pre-AI | With AI (mid-2026) |
|------|--------|-------------------|
| Core skills | Tool proficiency, workflow design | Business judgment, experimental design, paranoia about model outputs |
| Meeting cadence | Heavy tools, Figma, multiple design tools | Single design tool, whiteboarding, fewer artifacts |
| Bottleneck | Engineering velocity | Understanding user needs and business value |
| Hiring bias | Balanced junior/senior | Heavy senior bias (25–35, high agency, ownership) |
## Mercor's data business: scale, margins, and the cottage industry problem
Mercor operates a two-sided platform: a marketplace for expert talent (doctors, lawyers, coders) and a managed service that produces eval/training datasets. The company has grown headcount ~10x in the past year (now ~500 people) and is "cash-flow insane" – ending every week with millions more in the bank. Margins are not fixed; they are decided after the fact based on costs (expert pay + LLM spend for synthetic data and quality control). The goal is to deliver the best value, not to maximize margin upfront.
Nitski identifies the biggest threat to Mercor's margins as the "cottage industry" of VC-subsidized annotation startups where founders do the work themselves. Labs love these because they are "totally mispriced" – founders raise cash and bid low. But these operations do not scale: when a lab wants to 10x throughput, they must return to mature providers like Mercor. Nitski sees this as healthy competition that pushes Mercor to improve.
The company is deliberately moving downmarket to make self-serve human-data projects feasible for all enterprises. The challenge is that running a human-data project is inherently complex: edge cases must be surfaced continuously, instruction documents are often 100+ pages, and the data types change frequently (from SFT to preference ranking to rubric-based annotation to RL environments). The product team is organized into two product areas (marketplace and annotation platform), each with 2-3 PMs, plus dedicated data scientists and flex designers.
## The future data types: environments, cybersecurity, and robotics
Nitski highlights three emerging data categories that are growing rapidly:
- **Environments** (RL training data): Simulations of apps and file systems where agents learn to interact. This is the frontier data type, replacing static preference data. It requires high-fidelity mocks of production systems (e.g., Salesforce). It's complicated to set up but represents the next big wave.
- **Cybersecurity**: An adversarial, uncapped-reward domain where goalposts constantly shift. Data for offensive and defensive capabilities is in very high demand, with "very interesting data types" that Nitski cannot detail due to customer confidentiality. This domain will never reach sufficiency.
- **Robotics**: Physical data is nascent relative to GenAI and autonomous vehicles. Nitski expects a "ChatGPT moment" for robotics, but cautions that scaling physical systems is harder than software; he suggests it may resemble the Waymo rollout curve rather than a viral software hit.
He explicitly predicts that the *real-world physical data market* will be a significant revenue line for Mercor in three years (by 2029). This is coupled with his own changed mind: he was initially skeptical that environments (RL environments) would work at scale, but high demand and persistent engineering solved the problems.
## Hiring, culture, and the San Francisco talent war
Nitski is blunt about the brutal hiring environment in San Francisco, but notes that "it's easy when you're on a rocket ship." Mercor has not been deterred; it hires for high agency and ownership, even tolerating "a bit of a douche" if the person is super talented. The culture emphasizes in-office presence, paranoia, and fast movement. The biggest failure mode in hiring is not catching a lack of agency and ownership early – this is hard to assess in interviews and cannot be coached.
Nitski advises his hypothetical younger brother to "get a real internship as soon as possible" at a fast-growing San Francisco company (~500 people, not super early) that operates at the frontier. He explicitly downplays the value of university education in a field that updates rapidly. Mercor itself is at ~500 people but "still acts like a startup" with a cultish vibe, offsites (recently Tofino, Canada for surfing and floating sauna), and constant communication challenges as headcount grows.
## Cross-theme synthesis
The episode presents a coherent view of where the AI data industry stands eight months after the publication date. The central tension is between concentration risk (frontier labs as dominant customers) and the opportunity to democratize data to all enterprises. Nitski’s confidence comes from cash flow, not from strategy – he admits that the biggest challenge is "moving down market" with a product that is still too complex for self-serve. The company’s bias toward senior hires and toward judgment-over-execution suggests that the PM role is evolving faster than the hiring market can supply. The most provocative claim is that open source models expand the data market rather than shrinking it, which runs counter to the "AI commoditization" narrative. For investors and operators, the actionable insights are: (1) data valuation lifts with model performance; (2) the enterprise ROI debate is premature; (3) the data provision business has tailwinds from robotics and cybersecurity; and (4) the human element (expert annotators, PMs with business judgment) remains the bottleneck, not compute or algorithms.
Open source vs frontier modelsEnterprise AI ROISynthetic data and data providersHuman data annotation challengesProduct management in AI eraHiring and talent in AICybersecurity and AIRobotics data marketHypergrowth company scaling
In late July 2026, a16z partners Sarah Wang and Kimberly Tan hosted Decagon co-founders Jesse Zhang (CEO) and Ashwin Sreenivas (CTO) for a 79-minute conversation that functions as a defense of the application layer at the exact moment the industry has declared it indefensible. The narrative that dominated the first half of 2026 — Tan states it bluntly — was that Anthropic and OpenAI are "the last startups" and will take over everything, reducing application companies to thin UIs with implementation attached. Decagon is the strongest live counter-case: a customer-experience company, backed by a16z almost exactly three years ago, that now runs 90% of its inference on fine-tuned open-source models, maintains its own research organization (Decagon Labs) as a kind of model factory for the customer-service use case, and counts several of the world's largest banks, airlines, and telecoms as customers. The episode's central argument, assembled from the founders' answers to Sarah Wang's bluntest question — "What's Decagon's moat ten years from now if we hit AGI?" — is that software does not disappear at AGI. What changes is ownership: frontier labs get general intelligence, while application companies keep the fine-tuned behavior, the business logic, and the deployability infrastructure that make raw model capability usable inside a regulated enterprise.
Zhang divides his time between the CEO job and an overlapping second career as one of the few founders whose essays consistently land at the center of the current industry debate — his open-source-versus-closed-source piece went viral right before Thinking Machines Lab and Kimi K3 shipped new open models. Sreenivas brought the forward-deployed ethos from Palantir, where he was a deployment strategist, and has spent three years trying to productize that ethos into the core product rather than let it congeal into consulting. Together they walk through the company's mechanics: why a fine-tuned "dumber" model beats a frontier model on its own task while being cheaper and faster; how Agent Operating Procedures (AOPs) became the canonical productized form of what forward-deployed engineers used to write in code; how Duet and Duet Autopilot — a pair of frontier-model agents — now write the procedures, build the tests, and review millions of conversations to improve the core agent; how the sales motion productizes the deployment journey for regulated enterprises; and why the founders believe "AI will kill jobs, but not careers." Kimberly Tan supplies the episode's most unsettling framing along the way: a candidate she was recruiting to a16z declined because "we'll have AGI, we don't need careers in the long term." Jesse Zhang's answer — "I'm certain there will be careers after AGI" — is the thesis that ties the technical and existential halves of the conversation together.
## The open-source pivot: 90% of Decagon's inference now runs on fine-tuned open models
The conversation opens where the industry's attention is, and Zhang narrates Decagon's journey as a three-act story. Act one: at the start, "the goal was to just get something working," so the company used frontier models from OpenAI and Anthropic, which were "one-upping each other in terms of how the models performed." Act two came with scale: larger enterprise customers holding millions of their own customers, plus the launch of Decagon's voice agent, made latency the binding constraint. "The only way to get latency down, but also kind of make our agent operate the way we want it to, is to use smaller models." The frontier labs do offer small models, Zhang says, but "you can't really control them in the way that you want," and most out-of-the-box small models are not good enough at the specific task — so you have to fine-tune them. Act three began roughly a year before this recording, around mid-2025, as Decagon moved onto open-source models, stood up a research team ("a very expensive team"), and started generating its own evals and benchmarks, because "you can't just use some public eval set" when testing on your own task. Today the split is 90% open-source for the core workflow and 10% frontier models for "new projects or new products."
The intellectual justification for the pivot is that an agent's job decomposes. A customer conversation is not one task: the agent is simultaneously classifying the topic ("what topic is this person talking about?"), detecting bad actors ("is this person a bad actor that's coming in and trying to mess things up?"), and generating responses. Each subtask needs one skill performed at the highest level, not the generality of a frontier model that can also do math and write code. A fine-tuned smaller model, Zhang argues, is "just as good or better than the big models" at that one task. Sreenivas sharpens the point into a critique of how the trade-off is usually framed on X/Twitter: the standard debate posits a choice between the smartest, most expensive model and a "dumbed-down" cheaper one. That framing, he says, is false.
> "Even if you have a, quote, dumber model... on the specific task we want them to do, they actually outperform the large, smart, state-of-the-art models. So we end up getting all three things. It is better at the task, it is cheaper, and it is faster." — Ashwin Sreenivas
| Attribute | Fine-tuned open-source models (90% of workflow) | Frontier closed models (remainder) |
|---|---|---|
| Task performance | Outperform large SOTA on the specific task after fine-tuning | Broad generality; best for open-ended, exploratory work |
| Latency | Low enough for real-time voice | Too high for real-time voice at scale |
| Cost per unit of output | A "nice side effect," not the initial driver | Material at scale — the real tokenomics debate |
| Control | Steerable and retrainable | Easy via API, but not controllable internally |
| Role at Decagon | Core conversation flow: topic ID, abuse detection, responses | New products, auxiliary tasks, Duet Autopilot-style exploration |
Zhang's general framework: every model can be evaluated along three dimensions — cost, intelligence, latency — and the winning configuration puts you at the limit of all three. Decagon explicitly pulled back on intelligence (allowed, because the task was narrow) to buy latency. Cost was not the driver: the unit of output is a conversation, customers care about agent performance not token counts, and tokens per conversation have actually risen because Decagon runs more model calls per conversation to add checks and parallelization. Sreenivas adds the stage caveat: the tokenomics debate dominating X makes sense for a company running entirely on frontier models; once you can decompose, fine-tune, and deploy open-source models quickly, the cost pressure recedes.
When do frontier models remain necessary? For what Sreenivas calls "auxiliary tasks" outside the primary conversational flow, and for Duet Autopilot — the agent that improves the core agent by reviewing roughly one million conversations, finding trends, creating variants of the primary model, and testing which variants perform better. That is "a much more broad, open-ended, exploratory task," and frontier models are the right tool. Both founders are also careful about how fast the rest of the enterprise world follows. Enterprises will eventually adopt open-source fine-tuning, Zhang says, but slower than people think: they must assemble data, build use-case-specific evals, and pass model-risk governance and security reviews. Counterintuitively, the share of open-source inference is currently going *down*, not up, because enterprises keep spinning up new use cases on frontier APIs; once a use case is proven and solidified, migration to open source becomes "strictly better" on cost and latency. On make-versus-buy, the boundary is coupling: training infrastructure and especially evals are so tightly coupled to Decagon's use case (they measure the whole system end-to-end, not loss curves) that they build those in-house; commodity pieces like labeled data and dataset-diversity measurement they buy from other vendors.
## Why the application layer outlives "the last startups"
The fine-tuning economics explain why an application company can exist; the next question, which Tan poses directly, is whether the application layer can keep existing once the labs themselves approach AGI. Zhang's answer, from the enterprise buyer's point of view, starts by dismantling a misconception: "a common misconception that people have is that fine-tuning is a way to customize it for that customer" — in fact, most of Decagon's fine-tuning customizes for the use case (customer service) across all customers. That asymmetry is why an application company can justify a research team and a single enterprise generally cannot: "it's worth it for us to do it because that's all we do." An enterprise building its own agent on frontier models hits a different wall: business procedure is taught in context, not through fine-tuning ("if you were to fine-tune on that, you would have to reverse it every single time you change your procedures"), and the second day after launch the customer looks at real conversations and wants three things changed — then pays for engineering iteration forever. Partnerships with application companies make sense, he argues, when the use case needs a deep vertical platform: integrations, business-logic capture, testing and experiments, QA, and compliance tooling. The labs' general agents will keep improving, but generality is the opposite of the depth a core vertical requires.
| Asset | Who owns it | Example from the episode |
|---|---|---|
| General model capability | Frontier labs | Math, coding, reasoning — the frontier's "smart" models |
| Use-case-tuned model behavior | Application companies | Fine-tuned models for customer-service topic selection, latency-optimized voice |
| Business logic and process execution | Application layer | Rebooking three people after a canceled flight; AOPs |
| Enterprise-deployability infrastructure | Application layer | Model-risk governance, QA, compliance monitoring, guardrails |
Sreenivas is "not as bought into the labs are the last startup view of the world." The convergence is real — labs are building applications to prove enterprise ROI, and application companies like Decagon are building models to squeeze out performance, latency, and cost. But even at AGI, agents are not self-sufficient; they need somewhere to store work, pull information from, and reason about things. His proof: "human beings are kind of AGI," and humans have always needed software — CRMs, databases — to track their work. A certain class of SaaS built solely for humans to do work will face heat, but "I don't think software as a whole in any meaningful way is going away."
> "Even once you have AGI, agents are going to need somewhere to store work and pull information from and reason about things. I don't think software as a whole in any meaningful way is going away." — Ashwin Sreenivas
Both founders are equally sharp about the forward-deployed-engineer trend that has become a buzzword in their ecosystem. Sreenivas, who lived the Palantir model, says the term is used too loosely, and it is dangerous to confuse free consulting work with building product. He repeats Palantir CTO Shyam Sankar's internal phrase as the standard: "forward-deployed engineers eat pain and excrete product." The catch is that very few companies can sell and deploy like Palantir — closing massive deals off the bat that make the FD investment worth it. Startups adopting a "we'll do any AI use case for you" strategy, Zhang warns, "will eventually have to reckon with: can we find a product that's scalable?" Otherwise they are building a modern Accenture — fine as a business, but not a software company. When the founders say "product-led," they mean it as a discipline: FD engineers build core product, and anything learned in the field that is not contributed back to the core product is a failure. "The goal at the end of the day is, we should have the best product out there and be able to iterate on that faster than anyone else."
The same logic extends to SaaS's survival. Sreenivas frames Decagon as democratizing the concierge experience: a $100,000-a-year customer gets the full white-glove treatment, while a $10-a-year customer cannot be served by humans because the unit economics don't support it. If AI makes that experience cost $0.10, the business will happily offer it. But the concierge, human or agent, still needs a system of record: humans write notes in CRMs, and AI agents "will need somewhere to put that information." Zhang is bullish on CRMs as sources of truth — agents will use machine interfaces instead of graphical ones, and CRMs get pinged more, not less. Decagon, for its part, has "zero desire to build a CRM" because there is too much to do in the agentic layer.
## The productization machine: AOPs, Duet, and Duet Autopilot
The productization reflex that defines the model strategy also defines the product story: the same discipline that turned a customer-support model into a model factory produced the company's signature products. The first version of Decagon's core agent was a pile of manual machinery: a proprietary procedure format the founders call Agent Operating Procedures (AOPs) that teaches the AI how to do things; tools and integrations the procedures call to reach customer systems and APIs; a test suite simulating situations; and, once live, humans manually reading conversations to find failures. AOPs themselves were a productization — before them, procedures were written in code, which consumed enormous forward-deployed engineering time; plain text made them customer-editable.
Duet is the second agent: much bigger and much slower than the customer-facing one, its job is to do all the authoring and maintenance work that used to be human. Feed it transcripts and documentation, and it writes the procedures, the integrations, the tests, and the simulations, then monitors production conversations autonomously — flagging, in effect, "I read these a thousand conversations, and there's this one topic that we do really poorly on... I've also drafted these improvements for you." Duet Autopilot is the next layer: it reviews the million-conversation corpus, finds trends, creates variants of the primary model, and — via live experiments — determines which variants actually perform better. The three agents form an explicit stack.
```mermaid
flowchart TB
U["Customer conversations"] --> A["Core conversational agent, fine-tuned open-source models"]
E["Duet, the authoring agent, writes AOPs, tool integrations and tests from transcripts and documentation"] --> D
D["AOPs, Agent Operating Procedures, plain-text business logic, tools and guardrails"] -->|governs| A
F["Duet Autopilot, the iteration agent, reviews ~1M conversations, flags weak topics, drafts improvements and experiments"] -->|improves| A
```
| Agent | Model tier | Job | Output |
|---|---|---|---|
| Core conversational agent | Fine-tuned open-source (90% of inference) | Customer conversations: topic ID, abuse detection, responses | Resolved conversations at low latency |
| Duet | Frontier reasoning models | Authoring: turns transcripts + docs into procedures, tools, tests | AOPs, integrations, simulations |
| Duet Autopilot | Frontier reasoning models | Iteration: reviews ~1M conversations, finds trends, creates and tests variants | Improvement drafts, model variants |
> "Instead of us having to write these AOPs and write these integrations and tools into their systems and write these tests and monitor the conversations, Duet just does all of that." — Jesse Zhang
The "oh shit" moment, Zhang says, is that none of this was possible at founding. It became possible when reasoning models got better — the same OpenAI/Anthropic reasoning advances that power coding agents, built "mostly for the coders of the world," turned out to transfer to writing procedures and tests, even though Decagon's tasks were never part of the training distribution: "clearly the models were not trained on our specific task... but they're still good at it."
The productization sequence is exact, Sreenivas says: forward-deployed people hit a manual bottleneck (writing AOPs), they productize the bottleneck into the product (Duet), users adopt it, a new bottleneck appears (iterating on live agents), and that gets productized next (Duet Autopilot). The rule: everything is built around "what can we productize from forward-deployed work so that engineers and any kind of customer-facing resources on our team don't need to be as heavily involved."
## The enterprise sales playbook: glass box, not black box
If the productization machine is what Decagon builds, the sales motion is how it monetizes the result — and the founders' account of enterprise selling is as engineered as their model stack. Tan frames the competitive position as a two-horse race between Decagon and Sierra, against what once looked like a field of Goliaths. Zhang is respectful about Sierra ("very competent teams"), but describes a recent customer that switched from Sierra to Decagon in terms that explain the product thesis under pressure. With Sierra, the experience was mostly forward-deployed engineers and, from the customer's perspective, a black box: any new journey or any deeper understanding of what was happening in conversations required going through the FDEs, who were eventually staffed to other things. Over a year, the customer built out roughly three journeys. After switching to Decagon, the same customer spun up seven new journeys within about a month — because the product is designed so the customer's own teams, including non-technical staff, can operate it.
| Dimension | Sierra (as characterized by Jesse Zhang) | Decagon |
|---|---|---|
| Deployment model | Mostly forward-deployed engineers | Productized core product; customer teams operate it |
| Post-sale experience | Black box — customers go through FDEs for insight and changes | "Glass box" — customers self-serve |
| Iteration speed | ~3 new journeys built in a year | 7 new journeys spun up in ~1 month |
| Control | FDEs staffed to other things over time; drag | Customer's own non-technical staff can build |
Zhang notes the honest caveat: some customers prefer the black box — "hey, you guys do everything for us" — so the market segments. But the glass-box design is the differentiator he is betting on: "we like to call this a glass box approach instead of a black box."
How did two first-time enterprise sellers get into the largest banks, airlines, and telcos so fast? The category sells itself — every enterprise has top-down pressure from boards and C-suites to adopt AI, and customer service plus coding agents are the two obvious entry points, so Decagon does not spend time convincing buyers the category exists. The hard part is navigating the org and having empathy for what buyers value and fear. Because it is still early, the founders themselves carry the end-to-end process: Zhang estimates 80% of his time now goes to sales. The tactics are structural: take the project in pieces ("let's really just pick one or two of the top use cases and just get a win there") because gigantic banks and airlines cannot move at startup speed; and productize the deployment journey itself. Sreenivas emphasizes the regulated-enterprise angle: the question "will this product work for me" is often less important than "can I actually get this live," so Decagon mapped the model-risk process, the testing process, the rollout plan, and the issue-remediation loop in granular detail, and walks enterprises through them before the contract. "The product and technology part of what we sell is important, but equally important is us helping them think through the process to actually get this deployed at scale."
The early go-to-market team, by Zhang's account, was built from unusual profiles: people with non-traditional sales backgrounds who rotated in-house after seeing Decagon from within the industry (some cold-applied), plus a notable cluster of Ivy League athletes. Scaling that team is still unsolved — enablement and org structure lag. International expansion follows the same pull model: Raghu Raghuram, the former VMware CEO who joined a16z the prior year, is helping the firm's AI companies go global, and Decagon's Australia office exists because of customer pull, not planning. Two structural forces make international earlier for AI companies — every buyer has tried ChatGPT, creating board-level urgency, and language adaptation is far easier with AI than for the last generation of enterprise software — while the counterweights are data residency requirements and sharp local competitors who know the market better.
## From customer support to the front door: the concierge thesis
Once inside the enterprise, the product's scope expands in lockstep with model capability. The company was founded as a customer-support agent partly because that was the sharpest pain and partly because that was the ceiling of what models could do; today Sreenivas describes the design principle in a way that has not changed: "the thing that we built was not an agent that does customer support well, but rather an agent that follows business process well."
> "The thing that we built was not an agent that does customer support well, but rather an agent that follows business process well." — Ashwin Sreenivas
Customer support, inbound sales qualification, and proactive operational outreach are all, at bottom, the same pattern — an agent executing a business process — and the team built flexibly because they bet the models would get better. They did; what improved specifically was instruction-following. A few years ago models needed very tight, bounded instructions; now they can take broad guidance and "fill in the gaps like a human would," which matters because sales conversations "bob and weave" and cannot be scripted the way support flows can.
| Use case | What it demands of the model | How it came to Decagon |
|---|---|---|
| Customer support | Tight, well-scoped procedures | Original product — the capability ceiling when the company started |
| Inbound sales qualification | Open-ended discovery questions; conversations that "bob and weave" | A support customer realized Decagon knew their product and brand, and asked for sales help: answer questions, do discovery, route large deals to enterprise reps |
| Proactive operational outreach | Monitoring accounts, initiating contact | Another customer uses Decagon to reach out as soon as issues appear on an account |
Zhang's long-term framing is at once simple and total: "An AI agent should just be the front door of your business, and every interaction — reactive or proactive — with a customer should be handled by AI." The roadmap is deliberately fluid — a 12-month plan "to a T" is impossible when building is this fast; "if you have those things, you should just build them right now." The signal for what to build comes from customers, not the founders' imagination. The product's horizontal shape is a strategic bet: in past software cycles, the horizontal winners (Salesforce, Zendesk) beat vertical specialists because scale and depth of the core product outweighed vertical-specific features, and Decagon expects the same consolidation in its category — local competitors will emerge, but "from a vertical and sort of market point of view, there will be consolidation."
## The moat is deployability: AGI, jobs, and the Jevons paradox
If the preceding sections describe how Decagon wins today, Sarah Wang's question forces the harder version of the bet: "Let's say we hit AGI and the models can do all sorts of things we can't even imagine today. What's Decagon's moat?" Sreenivas's answer distinguishes the short-term moat from the unknowable long term. In the short term, the moat is the ability to work with enterprise resources: "the capability of models today is far greater than they are being used for within the enterprise," and you cannot simply give a model access to everything and let it figure the rest out. Even a perfect model needs an enterprise wrapper — and that wrapper is software.
| Deployability layer | What it does |
|---|---|
| Authorization and guardrails | Tells the model what it can and cannot do; ensures nothing catastrophic happens |
| Human-in-the-loop governance | Lets hundreds of enterprise experts verify agent behavior in their domains |
| Testing and regulatory controls | Proves the agent stays inside regulatory lines before and after launch |
| Insight extraction | Reads the millions of conversations generated at scale to feed the rest of the business |
Sreenivas is candid about the timeline: this is the moat "for the next few years"; once agents can build that deployability infrastructure on the fly — "that I don't know, and we'll figure out in three years from now."
Asking about bottlenecks, both founders go straight to hiring — "we are voracious consumers of tokens, but we've always loved more great people" — rather than model capability. They note the apparent paradox that AI coding startups, the most sophisticated users of AI tools, are hiring aggressively; Sreenivas's explanation is that everyone does the same calculus: if competitors use AI to build three times faster, you hire to build three times as much, so net hiring has not declined. The remaining model-side items on their personal watchlists are voice-to-voice models and smaller models being smarter out of the box.
On careers and AGI, the conversation turns philosophical. Tan recounts the losing argument with the candidate headed to a frontier lab: "we'll have AGI, we don't need careers in the long term." Zhang's retort: "I'm certain there will be careers after AGI," because most jobs are made-up layers of abstraction — "unless you're building infrastructure or growing food... you're still going to do things for other humans." The more concrete version of that belief is the Jevons-paradox argument about customer support, which Tan calls "the best example of Jevons' paradox in real life" she has heard: when support costs drop 30%, most customers do not fire 60% of the team; they expand support because latent demand exceeds supply. One early Decagon customer was receiving about 50,000 support tickets a month; after automating, it concluded "our customers have a lot of problems" and made support more accessible — on every page, prominent where users get stuck, and free for free-tier users.
> "AI will kill jobs, but not careers." — Jesse Zhang
BPO outcomes vary, Zhang says: some enterprises use BPOs far less, while others are not in cost-cutting mode at all and use Decagon to keep headcount flat while growing, or redeploy people toward revenue-generating work. Revenue generation is, he says, the next big area as AI matures: "you first start with these cost-cutting use cases because those are easy... but revenue-generating use cases should also be able to be done through this conversational interface."
## Culture, distance, and the founder operating system
The final layer of the playbook is the company itself — and the way its founders run their own attention, culture, and decision-making through the same machinery they sell. On "grind slop," the Twitter genre of performative work culture, Zhang is blunt: Decagon has never posted it, and that is not self-denial — working hard is an effect of wanting to build a good product, not a goal, and no one is mandated to be in on weekends; people are in the office "just so that we can maximize communication." The culture is a team sport with deliberately blurred org lines: engineers routinely join early sales calls, salespeople debug product, and the agent-PM organization works both ends of the spectrum, all pointed at a specific outcome — closing a deal or shipping a launch. "It's a we're-all-in-this-together to get this across the line." Scaling that beyond San Francisco is acknowledged as unsolved: every stage of growth requires new institutions to transmit the culture; new hires are flown to San Francisco for two weeks to absorb what Sreenivas calls the original "soup of culture," and new offices are seeded by veterans from the hubs who stay for a few months until the outpost has its own culture. (Ben Horowitz, they note, described a16z's own culture to them as "very action-oriented" — no fluffy stuff.)
The founder operating system is itself an AI product. Zhang notes that being a solo founder (as both he and Sreenivas were previously) is slow because there is no one to bounce ideas off; their partnership works because ideas can be talked out in real time. Sreenivas has now built agents to play that role for himself: the bottleneck in his work, he says, is business context, not ideas — "the constraints that we have, the goals that we're going for" are painful to re-explain — so he built a system that "looks over my shoulder" constantly, compiling context on hires, open deals, and current problems. He can query it ("there's this person we're thinking of hiring — what do you think?") and get answers that reason over accumulated context: flagging that a candidate replicates a gap the team already has, or that a deal is repeating a prior failure to validate early. His goal is to outsource context-gathering so decisions are faster. The accompanying anecdote — he adopted a "disagree with me aggressively" Claude prompt posted by Marc Andreessen, loved it, and handed it to his wife, who turned it off within a day because "Claude was being so mean to me all day" — is the episode's reminder that judgment about when to want disagreement is itself a scarce skill.
Finally, the founders' media strategy, prompted by Tan's observation about the Brian Chesky AI-slop backlash and Zhang's own viral essays: X matters less as distribution for company updates and more as "a single timeline that everyone reads" — it "kind of mind-controls everyone into thinking about the same thing," so having a say in it is strategically valuable. Zhang cites venture investor Jeremy Giffon's argument, from Patrick O'Shaughnessy's podcast, that "when people become billionaires, now they want to become influencers — because those people hold the real power... they can influence what the whole world is thinking about." Zhang's own practice: post industry theses, not company promotion, because self-promotion gets no traction on X; use AI for brainstorming topics, not for writing; and never cross-post LinkedIn and X, because "very few things do well on both" — LinkedIn is for classic announcements and fundraises, X is for placing yourself on the single timeline. Attribution is indirect but real: a post discussed on the All In podcast reaches CIOs; X-driven coverage filters up into mainstream media (Sreenivas recently appeared in The New York Times on the open-source debate) — and that, Zhang says, definitely reaches the people who write enterprise checks.
## What to watch
The moves that recur across this episode — decomposition, fine-tuning, productizing the forward-deployed workload, productizing the deployment journey, building agents to capture one's own business context — are the same move at different scales: compress the scarce resource (context, judgment, field learning) into something repeatable before it becomes a consulting line. That "productization reflex" is the closest thing the founders articulate to a durable edge, and their honest caveat is that the model landscape will keep moving underneath them.
- **The enterprise migration to open source.** Zhang predicts the share of open-source inference will swing back up as 2026's new use cases solidify and clear model-risk governance. The bet is that Decagon's model-factory ability keeps widening its advantage over any competitor still entirely on frontier APIs.
- **Duet Autopilot's scope creep.** It already reviews ~1 million conversations, drafts improvements, and runs variants. Sreenivas draws today's boundary at AI deciding what to build — taste and "is this done yet." Watch whether that boundary holds.
- **The two-horse race.** "Seven journeys in a month versus three in a year" is a strong claim, but Zhang concedes a segment of customers prefers the black box. The market may segment rather than consolidate to one winner.
- **The model-side watchlist.** Voice-to-voice models and smaller models smarter out of the box are the two technology items named explicitly as things the founders are waiting on.
- **The labor narrative.** Jevons' paradox in customer support is the cleanest argument that agentic AI creates more work than it destroys. Whether revenue-generating use cases (sales qualification, proactive outreach) outgrow cost-cutting ones is the metric to watch.
Open source versus frontier modelsFine-tuning for enterprise use casesCustomer support AI agentsForward deployed engineering modelAgent Operating Procedures and DuetEnterprise AI sales and deploymentAI concierge product visionAGI impact on careersCompany culture and hiring