Meta Loses Another Star AI Researcher Despite $1.5B Pay Package

Andrew Tulloch, a core researcher at Meta's TBD Lab, has left the company just two days after the launch of Muse and is set to join Anthropic's inference and performance team to optimize Claude Code training and improve model responsiveness. Tulloch had returned to Meta last year on a compensation package worth about $1.5 billion and worked on Muse-related R&D. His departure follows that of another high-profile AI hire, Yu Jiahui, highlighting Meta's difficulty retaining top AI talent despite lavish pay offers.