Google DeepMind loses leaders: Hassabis becomes chairman, Jeff Dean departs

Google reorganized its AI leadership as co-founder Demis Hassabis transitioned from running DeepMind day-to-day to become Chair of Google DeepMind and Chief Scientist of Alphabet, focusing on long-term AGI strategy and his work at Isomorphic Labs. In a LinkedIn post that drew nearly 18,000 likes, Hassabis wrote that he believes AGI 'is now close at hand' and wants to concentrate on the 'big picture.' Operational control of DeepMind passes to CTO Koray Kavukcuoglu.

The more disruptive news is the departure of Jeff Dean, a 27-year Google veteran and chief scientist, who left alongside three other senior researchers to co-found Discovery Loop — an AI startup reportedly backed by Alphabet itself. The talent exodus sent Alphabet stock down roughly 5%, a market signal that investors read the departures as a blow to Google's AI depth at a moment when Gemini has reportedly lost ground to Anthropic and OpenAI.

The context is a broader narrative of Gemini underperformance relative to rivals, captured in a widely-circulated SemiAnalysis piece titled 'Gemini is cooked but GCP is cooking' — suggesting Google's cloud infrastructure business remains strong even as its model leadership wobbles. Community sentiment was mixed: Gemini users were reassured by 950M+ monthly active users, but the stock drop and advice to 'standardize on Flash tier' reflected genuine uncertainty.

Skeptics question whether Alphabet backing Discovery Loop is a graceful off-ramp or a genuine loss. What to watch: whether more DeepMind researchers follow Dean out, how Kavukcuoglu steadies the ship, and whether the next Gemini release reverses the 'losing ground' narrative.