Nathan Lambert
Co-founder and executive director, Trillium Labs; author of Interconnects · as of 2026-10-04 · source
@natolambert · Website · Substack
Led post-training (OLMo, Tulu) at Ai2 and writes the Interconnects newsletter on open models; left Ai2 on June 2, 2026 and launched the open-science nonprofit Trillium Labs with Tom Zick on Oct 2, 2026.
Role changes
- 2026-10-02 Launched Trillium Labs (co-founder and director), a nonprofit for open post-training recipes and open frontier-AI science source
- 2026-06-02 Left Ai2 (post-training lead, co-led Olmo and Tulu) source
News mentioning Nathan Lambert (3)
- Nathan Lambert and Tom Zick launch Trillium Labs, a nonprofit for open post-training recipes and open frontier-AI science ★★
On Oct 2, 2026 Nathan Lambert (ex-Ai2 post-training lead, author of Interconnects) and Tom Zick unveiled Trillium Labs, a nonprofit "to foster the open science of frontier AI". It will publish fully open post-training recipes (data, code, evals, checkpoints) and later open infrastructure to study…
- Anthropic Frontier Red Team: open-weights GLM-5.3 nearly matches Claude Mythos Preview at exploit development, with weak safeguards ★★★★
On Sept 29, 2026 Anthropic's Frontier Red Team published an evaluation of Zhipu's open-weights GLM-5.3 and found exploit-development skills close to Claude Mythos Preview (ExploitBench V8 12% vs 14%; binary exploitation 4% vs 6%, all other tested models 0%). Its safeguards were bypassed 64–100% of…
- Meta FAIR and collaborators propose 'Context Language Models' that edit their own context as a file ★★
On Sept 29, 2026 a paper titled "Context Language Models" (arXiv 2609.37725, code at facebookresearch/context-language-models) proposed language models that manage their own context natively. The model treats its context as a file and can rewrite it freely, so the agent harness no longer decides…
Posts (3)
- Nathan Lambert unveils Trillium Labs, a nonprofit for the open science of frontier AI original ↗ Nathan Lambert @natolambert · x · 2026-10-02
Founding announcement of Trillium Labs by the former Ai2 post-training lead (~208k views): open post-training recipes, later open infra for RSI and reward-hacking research. - Nathan Lambert criticizes Anthropic's GLM-5.3 cyber report original ↗ Nathan Lambert @natolambert · x · 2026-09-29
Most prominent critique (70K views) of the Anthropic report from an open-model researcher. - 8 Predictions for the Era of Continual Learning original ↗ Dwarkesh Patel @dwarkesh_sp · blog · 2026-08-07
Dwarkesh's main 2026 essay predicts that once continual learning arrives it will make current safety regulation obsolete and give the leading labs strong moats. Zvi and Nathan Lambert responded.
Videos (1)
- The New Claude Opus 4.7 Feature Developers Are Obsessed With Mervin Praison · 2026-05-02
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