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Gabriel Pereyra

Unicorn founder

Co-founder & President at Harvey

San Francisco, CA

FoundedHarvey$11B

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About

Gabriel Pereyra co-founded Harvey in 2022 with his roommate Winston Weinberg and, as President, supplies the research DNA behind the legal-AI platform valued at $11 billion in March 2026 on roughly $190 million of annual recurring revenue. A machine-learning researcher who published with Geoffrey Hinton at Google Brain, then worked at DeepMind and Meta AI — where he co-authored the OPT-IML instruction-tuned model — he showed Weinberg GPT-3 in their Los Angeles apartment, built a chain-of-thought prompt that answered 100 California tenant-law questions well enough for attorneys to approve 86 of them, and cold-contacted Sam Altman with the results. He now runs Harvey Labs.

Beyond investing

Founded
Co-founded Harvey in summer 2022 with Winston Weinberg, then a securities and antitrust litigator at O'Melveny & Myers; the two were roommates in Los Angeles.
Education
Published machine-learning research with Geoffrey Hinton — a confidence-penalty regularization paper in 2017 and online distillation in 2018.
More
Built an early chain-of-thought GPT-3 prompt for legal questions and cold-contacted Sam Altman and OpenAI's general counsel with the results, which led to the OpenAI Startup Fund seeding Harvey. Their validating test: 100 California tenant-law questions, of which attorneys approved 86 answers. Co-authored OPT-IML, Meta AI's 175-billion-parameter instruction-tuned language model, before leaving to found Harvey. Runs Harvey Labs and argues application-layer companies can reach frontier-grade quality on a small budget through open-weight post-training.

Mentioned above: the Meta mafia → · the Meta mafia →

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Founder at Harvey

Intro paths

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In turn, Gabriel can intro founders to Harvey's investors below.

Harvey's investors · 31

Andreessen HorowitzMenlo Park · $500K – $50M checks · since 2025Artisanal VenturesTiburonCaesar VenturesBerlinCoatue ManagementNew York · $1M – $20M checks · since 2025ConvictionSan Francisco · $1M – $25M checks · since 2025CRV (Charles River Ventures)Bay Area · $250K – $5M checksDST GlobalGeorge Town, Grand Cayman · since 2024Elad GilSan Francisco · $100K – $10M checks · since 2022EQTNew York · since 2025Firebolt Ventures Management Company, LlcPalo AltoFOG VenturesGICSingapore · since 2026GV (Google Ventures)Mountain View · $250K – $50M checks · since 2024HOF CapitalNew York · $500K – $10M checksInertia VenturesNew York · $2M checksKhosla VenturesMenlo Park · $100K – $20M checksKleiner PerkinsMenlo Park · $500K – $15M checks · since 2025Kyber Knight CapitalSan FranciscoLightspeed Venture PartnersMenlo Park · $1M – $5M checksOpenAI Startup FundSan Francisco · $1M checks · since 2022Propeller VCJamaica Plain · $100K – $10M checks · since 2023REV Venture PartnersLondon · $1M – $10M checksRiverbend CapitalWashingtonSapphire VenturesAustin · $5M – $20M checksSarah GuoSilicon Valley · since 2022Sequoia CapitalMenlo Park · $100K – $50M checks · since 2026SV AngelSan Francisco · $150K – $20M checks · since 2024Valkyrie Ventures Management, LlcPark CityVerified CapitalSan Francisco · since 2025WealthUnion$10K checksWndrCoRedwood City · $100K – $10M checks · since 2025

Co-founders at Harvey

WWWinston Weinberg
Winston WeinbergCo-founder & CEO
GPGabriel Pereyra
Gabriel PereyraCo-founder & President

Co-founder & President at Harvey

Intro paths

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In turn, Gabriel can intro founders to Harvey's investors below.

Harvey's investors · 31

Andreessen HorowitzMenlo Park · $500K – $50M checks · since 2025Artisanal VenturesTiburonCaesar VenturesBerlinCoatue ManagementNew York · $1M – $20M checks · since 2025ConvictionSan Francisco · $1M – $25M checks · since 2025CRV (Charles River Ventures)Bay Area · $250K – $5M checksDST GlobalGeorge Town, Grand Cayman · since 2024Elad GilSan Francisco · $100K – $10M checks · since 2022EQTNew York · since 2025Firebolt Ventures Management Company, LlcPalo AltoFOG VenturesGICSingapore · since 2026GV (Google Ventures)Mountain View · $250K – $50M checks · since 2024HOF CapitalNew York · $500K – $10M checksInertia VenturesNew York · $2M checksKhosla VenturesMenlo Park · $100K – $20M checksKleiner PerkinsMenlo Park · $500K – $15M checks · since 2025Kyber Knight CapitalSan FranciscoLightspeed Venture PartnersMenlo Park · $1M – $5M checksOpenAI Startup FundSan Francisco · $1M checks · since 2022Propeller VCJamaica Plain · $100K – $10M checks · since 2023REV Venture PartnersLondon · $1M – $10M checksRiverbend CapitalWashingtonSapphire VenturesAustin · $5M – $20M checksSarah GuoSilicon Valley · since 2022Sequoia CapitalMenlo Park · $100K – $50M checks · since 2026SV AngelSan Francisco · $150K – $20M checks · since 2024Valkyrie Ventures Management, LlcPark CityVerified CapitalSan Francisco · since 2025WealthUnion$10K checksWndrCoRedwood City · $100K – $10M checks · since 2025

Co-founders at Harvey

WWWinston Weinberg
Winston WeinbergCo-founder & CEO
GPGabe Pereyra
Gabe PereyraFounder

Experience

  1. HarveyPresident & Co-Foundercurrent2022 — presentSan Francisco Bay Area
  2. MetaResearch Scientist2022Los Angeles Metropolitan Area
  3. Stealth StartupStartups2018 — 2022Los Angeles County, California, United States
  4. DeepMindResearch Scientist2017 — 2018Greater London, England, United Kingdom
  5. GoogleBrain Resident2016 — 2017Mountain View, California, United States

Skills & more

Research2Deep Learning1Machine Learning1Artificial Intelligence (AI)1Computer VisionData Science1Computer Science1Start-ups1AlgorithmsData Mining1Machine VisionRecommender Systems
+11 moreData AnalysisMachine Learning AlgorithmsSoftware DevelopmentScikit-LearnProgrammingPattern RecognitionPython (Programming Language)TensorFlowSQLKerasIntelligence

From Gabriel's professional profile.

Podcasts & interviews

featuring Gabriel Pereyra

How Harvey Built a Research Lab on a Budget

Sequoia Training Data

Harvey's Gabe Pereyra on Legal Agents & World Models

Artificial Lawyer · artificiallawyer.com

How Harvey is reinventing legal work with AI

Masters of Scale · mastersofscale.com

Frequently asked questions

Who is Gabriel Pereyra?
Gabriel Pereyra co-founded Harvey in 2022 with his roommate Winston Weinberg and, as President, supplies the research DNA behind the legal-AI platform valued at $11 billion in March 2026 on roughly $190 million of annual recurring revenue. A machine-learning researcher who published with Geoffrey Hinton at Google Brain, then worked at DeepMind and Meta AI — where he co-authored the OPT-IML instruction-tuned model — he showed Weinberg GPT-3 in their Los Angeles apartment, built a chain-of-thought prompt that answered 100 California tenant-law questions well enough for attorneys to approve 86 of them, and cold-contacted Sam Altman with the results. He now runs Harvey Labs.
Where does Gabriel Pereyra work?
Gabriel Pereyra is Co-founder & President of Harvey.
What companies did Gabriel Pereyra found?
Gabriel Pereyra founded Harvey.
Where did Gabriel Pereyra go to school?
Gabriel Pereyra studied at University of Oxford (Dropped out, PhD in Neuroscience); University of Southern California (Bachelor's degree, Computer Science).
What podcasts and interviews feature Gabriel Pereyra?
Tracked appearances include "How Harvey Built a Research Lab on a Budget", "Harvey's Gabe Pereyra on Legal Agents & World Models", "How Harvey is reinventing legal work with AI".

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