François Chollet, a leading figure in the AI world, is leaving Google after close to a decade.

In a post on X, the 34-year-old French developer said he’s starting a new company with “a friend,” but he declined to reveal many details.

“I’m very grateful for my decade at Google,” Chollet wrote in the post. “In that timespan, deep learning went from a niche academic topic to a massive industry employing millions.”