# Leonard Tang

> Leonard Tang is the co-founder and CEO of Haize Labs, a New York AI safety startup that stress-tests frontier language models by automatically jailbreaking them before they reach the public. A Harvard math and computer science graduate who turned down a Stanford PhD, Tang built Haize into a venture that frontier labs like OpenAI and Anthropic pay to break their models on purpose. By 2024 the company had raised a $12.5M seed led by General Catalyst at a $100M valuation, roughly eight months after founding, and Tang landed on Forbes' 2025 30 Under 30 list for AI.

- **Role:** Co-founder & CEO at Haize Labs
- **Organizations:** Haize Labs, Harvard University, Allen Institute for AI, Gamalon, Nvidia, Amazon
- **Nationality:** American
- **Education:** B.A. in Computer Science and Mathematics, Harvard University, PhD admission (declined to build Haize Labs), Stanford University
- **Known for:** Co-founded and leads Haize Labs, an automated AI red-teaming and reliability company, Raised a $12.5M seed round led by General Catalyst at a $100M valuation within roughly eight months of founding, Named to Forbes 30 Under 30 (AI), 2025

## Career timeline

- **pre-2023** — Interned at Gamalon, Nvidia, Amazon, and researched AI vulnerabilities at the Allen Institute for AI
- **2023** — Co-founded Haize Labs in New York City with Harvard classmates Richard Liu and Steve Li
- **2024** — Graduated Harvard; declined a Stanford PhD to run Haize Labs full time
- **2024** — Closed a $12.5M seed round led by General Catalyst at a $100M valuation, roughly eight months after founding
- **2024** — Served on the external red team that pressure-tested OpenAI's o1 model
- **2025** — Named to Forbes 30 Under 30 in AI

## Achievements

- Co-founded and leads Haize Labs, an automated AI red-teaming and reliability company
- Raised a $12.5M seed round led by General Catalyst at a $100M valuation within roughly eight months of founding
- Named to Forbes 30 Under 30 (AI), 2025
- Member of the external red team for OpenAI's o1 model
- Authored research on adversarial attacks, robustness, and jailbreak techniques including bijection learning and multi-turn red-teaming
- Signed multi-million-dollar contracts with frontier labs and enterprises including Anthropic, Scale AI, AI21, Deloitte, Weights & Biases, and MongoDB

## Latest updates

- **2025-01** — Named to Forbes 30 Under 30 in AI.
- **2024-08** — Haize Labs closed a $12.5M seed round led by General Catalyst at a $100M valuation.

## Links

- Website: https://www.leonardtang.me/
- LinkedIn: https://www.linkedin.com/in/leonard-tang
- Twitter/X: https://x.com/leonardtang_
- GitHub: https://github.com/leonardtang
- YouTube: https://www.youtube.com/watch?v=Od20tCV2Krg

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Profile page: https://yespress.io/leonard-tang
Published by YesPress — https://yespress.io
Last updated: 2026-06-27