Top AI researcher Andrew Tulloch ditches Meta to work on training and inference at Anthropic

Anthropic's developer conference in May. Don Feria/AP Content Services for Anthropic Andrew Tulloch, a star AI researcher, is leaving Meta for Anthropic. Prior to Meta, Tulloch worked at the AI startup Thinking Machines Lab and, before that, at OpenAI. At Anthropic, Tulloch will work to optimize AI training and inference. After less than a year at Meta, the prominent AI researcher Andrew Tulloch is leaving for Anthropic. He'll start next week, an Anthropic spokesperson told Business Insider, and work on the startup's inference and performance team, where he'll aim to optimize the training of Anthropic's AI models and how they respond to users. As AI's talent wars steam on, Tulloch has become one of the most sought-after researchers. He had worked at Meta for 11 years prior to this latest stint, leaving for OpenAI in 2023. At OpenAI, he helped train its GPT-4o, GPT-4.5, and o3 models.