Overview

• The Wall Street Journal reported Tulloch's departure to Meta, which a Thinking Machines Lab spokesperson confirmed to the Journal as a personal decision.
• Reuters said it had not independently verified the report, and Meta did not respond to its request for comment.
• The Journal previously reported that Mark Zuckerberg sought to buy Mira Murati's startup, then approached more than a dozen staffers, including Tulloch.
• Tulloch was offered a package that could reach about $1.5 billion over at least six years, the Journal reported, contingent on bonuses and stock performance.
• Meta has pursued top researchers with some of Silicon Valley's richest pay and deals to close an AI gap after Llama 4 underwhelmed, according to Reuters' summary and industry comments including Sam Altman's claim of $100 million recruitment bonuses.