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Audio · 2025-12-05 · 44m · 5 moments

Scaling Legal AI and Building Next-Generation Law Firms with Harvey Co-Founder and President Gabe Pereyra

In just over three years, Harvey has not only scaled to nearly one thousand customers, including Walmart, PwC, and other giants of the Fortune 500, but fundamentally transformed how legal work is delivered. Sarah Guo and Elad Gil are joined by Harvey’s co-founder and president Gabe Pereyra to discuss why the future of legal AI isn’t only about individual productivity, but also about putting together complex client matters to make law firms more profitable. They also talk about how Harvey analyze ✦ AI generated

timeline · colored by role

01
Claim

The big problem Harvey is solving is no longer individual lawyer productivity, but how to make a team of lawyers working on a client matter more productive, and how to make an entire law firm working on thousands of client matters more productive and more profitable.

Harvey has shifted from building an IDE for individual lawyers to solving orchestration, governance, and enterprise-scale problems for teams and entire firms.

transcript

Gabe Pereyra: I would say in the past year and going forward, the big problem we're solving is not how do you make individual lawyers more productive? It's how do you make a team of lawyers working on a client matter more productive? And more importantly, how do you make an entire law firm working on thousands of these client matters more productive and more profitable. And so I think when you get to that scale, a lot of the problems you're solving are not just model intelligence problems. They are these orchestration, governance, and kind of all of the enterprise product problems that you run into at scale.

02
Mechanism

Associates function essentially as agents: they receive a high-level task from a partner, research case law, summarize, and draft — and Harvey is building systems that mirror that workflow.

Gabe explains that the first day they got GPT-4, co-founder Winston spent 14 hours redoing associate tasks in a hacky agentic way, giving them the early intuition that the direction of legal AI is toward agentic systems that mirror how associates work — getting a task from a partner, researching, summarizing, and drafting.

transcript

Gabe Pereyra: And actually, like when I was at DeepMind, a lot of the RL research I did was that. And so when we first got access to GPT-4, we had the very strong intuition of, okay, you're going to be able to string a bunch of these model calls or eventually do things like reasoning models where the full agent is differentiable. And even the first day we got access to GPT-4, Winston went in his room for 14 hours and just redid a bunch of his associate tasks. And when I looked at the work he was doing, it was essentially like this hacky agentic where he said, okay, I would need to go look up this case law, summarize it, take that summary, use it to draft. And so seeing him do that gave us the intuition very early on of that's the direction this is going. And you can kind of think of associates as agents. They get this task from a partner that's, hey, I have this high-level case strategy. I want to see if I can find a bunch of case law that supports it. Can you go research that, look it up, cite it, write me a memo? And so a lot of the systems we're starting to build look a lot like that.

explains mechanism · 1

04
Prediction

The role of law firm partners — high-level strategy, client relationships, and delegating work — does not change much with AI, just as the role of very senior engineers doesn't change; the lower-level functions change instead.

Gabe argues that the best partners' value — high-level strategy, client interface, and delegation — is not something models will replicate soon, similar to how senior engineers' roles persist. The change happens at the lower-level functions, not the partner role itself.

transcript

Gabe Pereyra: And to your point, I don't think that part changes where it's like when we think of the, like we're now larger consumers of legal services. And when we think of the best partners we've worked with, I don't think the models are doing what they do anytime soon. And I think what's interesting is I think the role of law firm partners actually doesn't change that much in the same way I don't think the role of very senior engineers changes with this because you're largely delegating work. And what you're getting paid to do is here's the high level strategy, here's the right abstractions, go write the code or do the legal research to help me do it, and I will interface with the client. And so I think that my guess is that doesn't change too much, but some of the lower level functions do change because of this technology.

gives example · 1provides context · 2rebuts · 1

05
Example

A senior partner like Gordon Moody at Wachtell brings the same kind of value as a distinguished distributed systems engineer at Google — deep architectural expertise from experience that is not public and won't go into the models for a long time.

Gabe explains that Gordon Moody, a former partner at Wachtell, has the same kind of system-level architectural understanding as a senior engineer, having been involved in the Dell privatization and restructuring. The decision-making process and reasoning traces behind these complex transactions are what's missing from public models, not the final SEC filing.

transcript

Gabe Pereyra: Kind of the analogy I was giving is why is a senior distinguished distributed systems engineer at Google so valuable? And a lot of it is the experience they have architecting these systems that none of this is public. This won't go into the models for a long time. And so if you're building search at Google, these people can just point out, hey, if you build this system this way at this scale, it's going to collapse for some reason that is super not intuitive. One of the examples that Gordon talked about early on was he was a part of when Michael Dell took Dell private and then restructured it and took it public again. And this was like a multi-year, super complex financial and legal restructuring of an incredibly large business. And what he, when you talk with him, is incredibly good at, it's the same feeling as when you talk with a very senior engineer, where he can just, he has the whole picture of this legal entity in his head... all you get from these public mergers is like an SEC filing. And so you do see the final result, but most of the value or what you need, I think, to eventually improve these models is the decision-making process, the same way you need these reasoning traces to train these models to do kind of any of these reasoning tasks.

provides context · 1

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