**[The AI Expert Meta Spent Big to Recruit Leaves in Less Than a Year, Once Turned Down a $1.5 Billion Offer]** Beating AI Newsflash: Meta AI researcher Andrew Tulloch is set to leave, less than a year after returning to Meta from Mira Murati's Thinking Machines Lab. Tulloch worked in the TBD Lab led by Alexandr Wang, which is the core team of Zuckerberg's current AI strategy. According to Semafor, Tulloch had been planning his departure for some time but waited until Meta released its new batch of open-source AI models and the personal agent Muse before leaving. Back in 2025, Meta had offered Tulloch a compensation package worth up to $1.5 billion over at least six years, but he declined at the time. This figure included maximum bonuses and potential gains from a significant rise in Meta's stock price. A few months later, Tulloch did join Meta, but Axios reported that his actual compensation was lower than the previous offer, though the exact amount was not disclosed. Tulloch had previously worked at Meta for 11 years before moving to OpenAI in 2023, after which he co-founded Thinking Machines Lab. His next destination remains unclear, and the reason for his departure has not been disclosed. [Original Link]