Meta has lost prominent AI researcher Andrew Tulloch to rival lab Anthropic, less than a year after he returned to the company. Tulloch, a co-founder of the AI startup Thinking Machines Lab, was reportedly offered a compensation package worth up to $1.5 billion over six years, highlighting the extreme financial stakes of the ongoing artificial intelligence talent war.

Tulloch timed his departure to follow the launch of Meta's new AI agent, Muse, which the company released on Tuesday

Meta loses a researcher recruited on a reported $1.5 billion package, an Anthropic scientist walks away before his stock vests and OpenAI brings a leading safety expert into its…