Google strips Hassabis of CEO role as Gemini leadership empties out

Sundar Pichai told staff on 5 August that Demis Hassabis is no longer chief executive of Google DeepMind. Hassabis moves to chairman of DeepMind and chief scientist of Alphabet, and keeps his separate role running Isomorphic Labs. Operational control of Gemini passes to Koray Kavukcuoglu, previously DeepMind's chief technology officer and Alphabet's chief AI architect, who becomes senior vice president of Google DeepMind and now owns Gemini 4, frontier research, and the Gemini app and developer teams, reporting directly to Pichai, according to Google's announcement.

Hassabis will shift to "high-level scientific strategy" across Alphabet, including frontier AI and AGI work, and step back from daily operations, advising DeepMind's leaders from London while working with Pichai on strategic and global AGI questions. Google's own figures, released alongside the reshuffle, show Gemini at 950 million monthly users and Gemma downloads at 900 million.

The timing sharpened the market reaction. The same day, Gemini co-leads Jeff Dean and Oriol Vinyals announced they were leaving alongside Sanjay Ghemawat and Quoc Le to found a start-up, according to The Next Web. That is four senior departures from the Gemini and research leadership in a single day, alongside the demotion of the executive who built DeepMind's reputation. Reports say Hassabis had already been handing Gemini product and consumer decisions to Kavukcuoglu for roughly a year, making this less a sudden break than a formalisation of a shift already under way.

Alphabet shares fell more than 5% on the news.

Google is betting that concentrating Gemini, frontier research and the developer teams under one operator will close the gap with OpenAI and Anthropic on shipping speed, rather than research prestige. Kavukcuoglu inherits that mandate with Gemini 4 already on his desk, and the market will judge him on release cadence, not papers.

The bigger risk is the exodus. Losing Dean, Vinyals, Ghemawat and Le on the same day as Hassabis's demotion signals internal friction that the succession framing does not fully explain. Their new start-up will now compete for the same talent and enterprise customers Google is trying to hold onto, and Alphabet's stock drop suggests investors read this as disruption first, streamlining second.