Nathan Lambert
Executive Director of Trillium Labs; writes Interconnects; author of the RLHF Book.
At a glance
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- Nathan Lambert is a machine learning researcher who works on open language models and how they are post-trained.
- He co-founded and runs Trillium Labs, a nonprofit for the open science of frontier AI.
- Before that he was the post-training lead building the Olmo models at the Allen Institute for AI (Ai2).
- He writes the newsletter Interconnects and wrote the RLHF Book.
Key facts
- Trillium Labs
- Co-founder and Executive Director of the nonprofit, which fosters the open science of frontier AI1
- Ai2
- Post-training lead building the Olmo models at the Allen Institute for AI2
- Research
- Olmo, Tülu 2 and 3, RewardBench, Zephyr-Beta, the Open LLM Leaderboard and Molmo2
- Book
- RLHF Book (2026), with a post-training course to go with it1
- Interconnects
- Newsletter on AI models and how they are trained, one to three posts a week, more than 300 posts2
- Podcasts
- Hosts Interconnects Interviews; guest on Lex Fridman (February 2025, February 2026) and Latent Space (July 2023, January 2024, July 2025)1
Roles
Connections
Links
Sources
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