Demis Hassabis steps down from Google DeepMind CEO role amid a major AI leadership shakeup

Google just rearranged the top of its AI org chart, and the timing says a lot. Demis Hassabis, who's led DeepMind since long before the ChatGPT era, is handing off daily operations to become chairman of the unit and chief scientist of Alphabet. That's a real shift in mandate: less spreadsheets and org charts, more AGI strategy and steering the science. Koray Kavukcuoglu, previously DeepMind's CTO and already Alphabet's chief AI architect, now runs things as senior vice president, reporting straight to Sundar Pichai instead of holding the CEO title himself. He'll be the one overseeing Gemini's model development from here.

Hassabis framed the move as a chance to focus on what he sees as an urgent moment. In his note to staff, he said AGI feels close and that the choices made now matter enormously. He's also planning to spend more time at Isomorphic Labs, Alphabet's drug-discovery arm, which he's repeatedly called the most consequential use of AI for human health. He mentioned Gemini 4 by name as evidence the company is still moving fast, though investors weren't fully convinced — Alphabet stock dropped about 5% after the announcement.

The reshuffle didn't happen in isolation. Jeff Dean, a 27-year Google veteran and its chief scientist, is leaving to co-found Discovery Loop, a public benefit corporation built to automate ML and scientific research. He's bringing along Sanjay Ghemawat, Oriol Vinyals, and Quoc Le — serious names, all former Googlers. Alphabet is backing the new venture as a founding investor and will provide cloud compute, which is a strange but telling arrangement: funding the people who just walked out the door. Dean told the New York Times that working outside a public company gives the team freedom to make calls that aren't strictly about the bottom line.

All of this lands while Google is already dealing with turbulence inside its AI ranks. Gemini 3.5 Pro, the next flagship model, has slipped months past its original June target. Noam Shazeer left for OpenAI. John Jumper, a Nobel laureate, went to Anthropic. Pichai's message to staff insisted Google still has the talent, the compute, and the distribution to win this race, but a reshuffle of this size, paired with a wave of high-profile exits, tends to read less like routine turnover and more like a company trying to steady itself mid-sprint.