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Open Models

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Anthropic OpenAI Claude NVIDIA Kimi K3 GPT

Tuesday, 2 June 2026

Farewell Ai2

Interconnects 2 months ago 21

Nathan Lambert departed the Allen Institute for AI after approximately two and a half years, where he led post-training work on the Olmo and Tülu model series. His major contributions included developing RewardBench, coining the term Reinforcement Learning with Verifiable Rewards (RLVR), and shipping Tülu 3 and Olmo 3, released in fall 2024 and spring 2026 respectively. Lambert plans to continue working on the open AI ecosystem while remaining based in Seattle, shifting focus to coordinate and improve the open model community rather than conducting frontier research within a single institution.

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Open Models

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