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Exclusive: AI researcher Andrew Tulloch is leaving Meta

Andrew Tulloch delayed his exit until Meta launched Muse and new open-source AI models, according to reports.

Summary by Semafor
Tulloch has been delaying his departure until the company successfully launched its new family of open source AI models and AI assistant, Muse.

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Andrew Tulloch, whom Meta signed with a large sum of money in the AI race, is leaving the company. The decision, coming after a return that lasted approximately 11 months, raises new questions in Zuckerberg's multi-billion dollar talent war.

Andrew Tulloch had only changed to the Facebook parent company in October.

Even though he has received a salary package in the billions, Meta has not been able to keep AI profile Andrew Tulloch, who is leaving the company after just one year.

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Semafor broke the news in New York, United States on Wednesday, September 9, 2026.
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