Leadership shake-up at Google DeepMind: Hassabis steps down, Dean leaves to found startup
Demis Hassabis steps down as CEO of Google DeepMind to focus on superintelligence research, while Jeff Dean leaves Alphabet to co-found Discovery Loop. Alphabet faces competitive pressure in AI.
This article was drafted with AI assistance from multiple sources and was reviewed and approved by a human editor before publication.
Alphabet announced a significant leadership reshuffle at its AI unit on Wednesday, 2026-08-05. Demis Hassabis, who has led DeepMind as CEO since 2010, is stepping down from the top role. He will remain with the company as chairman of DeepMind and chief scientist of Alphabet, while also continuing to lead Isomorphic Labs, the pharma spinoff. Hassabis cited the approaching of artificial general intelligence (AGI) as a key reason for the change, saying he wants to focus on research into possible superintelligence within Alphabet.
Jeff Dean, a long-time Google researcher and one of the key figures behind the Gemini model, is leaving Alphabet entirely. He is co-founding a startup called Discovery Loop, which will focus on AI models that can improve themselves with little or no human help. Google has invested an unspecified amount in the venture and will serve as its cloud provider. "We think there is opportunity for AI to more fully automate what has traditionally been a very human-intensive experimental loop," Dean said.
Several other leading developers of the Gemini model have also left the company, according to the announcement. The departures come as Alphabet faces competitive pressure in AI. The company recently announced plans to invest up to $40 billion in Anthropic, with $10 billion already invested in April 2026 and $30 billion more contingent on meeting milestones. Alphabet's stock fell significantly after the leadership news.
In the internal restructuring, Koray Kavukcuoglu, formerly CTO of DeepMind, will become head of AI model development and senior vice president. He will report directly to CEO Sundar Pichai and lead day-to-day operations. Pichai emphasized the need for speed: "We must continue to move quickly and purposefully."
The shake-up also affects other parts of Google's AI efforts. The AlphaFold team, which developed the AI program that predicts 3D structures of proteins from amino acid sequences in minutes, has been disbanded. Some employees were reassigned, while others left. AlphaFold has been used in neurodegenerative disease therapies and earned the Nobel Prize in chemistry.
Hassabis's new role as chief scientist of Alphabet signals a shift toward longer-term research, while Kavukcuoglu's appointment is aimed at maintaining momentum in model development. The combination of Dean's departure and the Anthropic investment suggests Alphabet is hedging its bets in the race for advanced AI.