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

After little than a twelvemonth astatine Meta, the salient AI interrogator Andrew Tulloch is leaving for Anthropic.

He'll commencement adjacent week, an Anthropic spokesperson told Business Insider, and activity connected the startup's conclusion and capacity team, wherever he'll purpose to optimize the training of Anthropic's AI models and really they respond to users.

As AI's talent wars steam on, Tulloch has go 1 of the astir sought-after researchers. He had worked astatine Meta for 11 years anterior to this latest stint, leaving for OpenAI successful 2023. At OpenAI, he helped train its GPT-4o, GPT-4.5, and o3 models. He past cofounded Thinking Machines Lab successful 2025.

Last year, while he was moving astatine the AI startup, he turned down a salary connection from Meta CEO Mark Zuckerberg that could person totalled $1.5 billion, The Wall Street Journal reported. He ended up decamping for Meta successful October.

Now, Tulloch will bring that extended acquisition to Anthropic.

Tulloch and Meta did not instantly respond to requests for comment. He's leaving the societal media elephantine soon aft it launched Muse, an AI supplier meant to autonomously complete tasks for users.

Anthropic, Meta, OpenAI, Google, and different tech companies person been successful a sounded conflict for AI researchers since the merchandise of ChatGPT, giving knowledgeable workers for illustration Tulloch a awesome woody of leverage — and earning power.

Semafor first reported that Tulloch was leaving Meta.

For Anthropic, the prosecute whitethorn connection immoderate calm successful an aggravated moment. The institution is preparing for its initial nationalist offering, dueling pinch rivals for business, and reckoning pinch mounting concerns astir the adverse effects of AI.

The interrogator Jacob Coxon sparked a activity of interest this week erstwhile he announced that he'd resigned from Anthropic and wrote that the "people building AI earnestly judge that it could termination america each by the extremity of the decade."

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