Google DeepMind CEO Demis Hassabis steps down as Alphabet reshuffles its AI leadership
The AMW Read
A top-tier lab's CEO steps aside and its longtime chief scientist departs to found a rival venture, taking senior researchers with him, amid a delayed flagship model release β a structural leadership and talent shift, not a routine update.
Google DeepMind CEO Demis Hassabis steps down as Alphabet reshuffles its AI leadership
Demis Hassabis is stepping down as CEO of Google DeepMind, though he remains chair of the unit and takes on the role of chief scientist for Alphabet, while continuing to lead Isomorphic Labs. Koray Kavukcuoglu, DeepMind's chief technology officer and Alphabet's chief AI architect, becomes senior vice president of Google DeepMind, reporting directly to CEO Sundar Pichai, and will oversee Gemini model development, frontier AI research, and the Gemini app and developer teams. Separately, longtime Google chief scientist Jeff Dean is leaving the company after 27 years to launch a new public benefit corporation called Discovery Loop, joined by Senior Fellow Sanjay Ghemawat, DeepMind vice president Oriol Vinyals, and Google Brain co-founder Quoc Le. The changes land as Google's flagship Gemini 3.5 Pro model, originally expected in June, has been delayed by several months.
This is the most visible change to Alphabet's AI command structure since DeepMind and Google Brain were merged, arriving as the company's model-release cadence is under scrutiny relative to rival labs. Moving day-to-day model leadership to Kavukcuoglu while Hassabis shifts into a chief-scientist and chair role separates long-range research direction from the operational push to ship Gemini on schedule. Dean's departure to found a new venture, taking senior research talent with him, adds to a broader pattern of veteran researchers leaving incumbent labs to launch independent efforts rather than join a single competitor outright.
For builders and investors tracking the frontier-model race, the reorganization is worth watching alongside the Gemini 3.5 Pro timeline: a delayed flagship release paired with a leadership change raises real execution risk for Alphabet's AI roadmap over the coming quarters, while Discovery Loop's formation signals that researcher-led competition may keep emerging outside the existing top labs.
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