[OpenAI Core Researcher for Inference Models Joins Anthropic] BlockBeats News, on March 4, OpenAI core researcher for inference models Max Schwarzer announced his resignation on the X platform and his move to Anthropic. It is reported that Schwarzer was one of the early contributors to the o1 inference model. He led the post-training of o1 and o3 and headed the entire post-training team over the past year, delivering GPT-5, 5.1, 5.2, and 5.3-Codex. Max stated that after joining Anthropic, he will focus on reinforcement learning research.