Google DeepMind Shake-Up: Hassabis Moves Up as Dean Leaves

Google and Alphabet chief executive Sundar Pichai has reshaped the company’s AI leadership, moving Google DeepMind co-founder Demis Hassabis into a broader Alphabet role while handing day-to-day control of the unit to its chief technology officer, Koray Kavukcuoglu. The changes were announced on Wednesday 5 August, alongside the departure of veteran Google researcher Jeff Dean and three senior colleagues for a new startup.

Hassabis will become chair of Google DeepMind and chief scientist of Alphabet, giving up operational responsibility for the AI unit to focus on artificial general intelligence (AGI), its wider implications and longer-term scientific work. He will remain based at Google’s London headquarters, continue to lead AI drug-discovery company Isomorphic Labs, and advise Google’s model and research teams.

In his message on the move, Hassabis said: “I've been working towards AGI my whole life, and as we enter this pivotal moment, I'm stepping into a new role as Chair of Google DeepMind & Chief Scientist of Alphabet.” He said the change would allow him to focus on long-term strategy and accelerating scientific breakthroughs, including work at Isomorphic Labs aimed at helping to cure disease.

Kavukcuoglu takes operational control

Kavukcuoglu, currently Google DeepMind’s CTO and Google’s chief AI architect, will lead the organisation as senior vice-president and report directly to Pichai. His remit includes Gemini model development, frontier AI research, the Gemini app, and the teams working with developers.

The title matters. Kavukcuoglu becomes senior vice-president rather than chief executive, a structure that places Google DeepMind more clearly within Alphabet’s conventional management hierarchy. That marks a departure from the unusually autonomous position Hassabis had held since DeepMind’s early years.

“Koray has been at DeepMind since its early days, and over his 13 years there, he has started our deep learning team and led the way on breakthroughs like WaveNet and DQN,” Pichai said.

Kavukcuoglu has spent 13 years at DeepMind and previously worked on technologies including WaveNet and Deep Q-Networks. The handover has reportedly been developing for some time: he had already been leading Gemini discussions in company briefings, while Hassabis had shifted much of the day-to-day responsibility for Gemini and Google’s consumer AI strategy over the past year.

Google said its approach to model safety will remain unchanged under the new structure. A company spokesperson said Kavukcuoglu’s teams have worked alongside safety and policy teams across Google and Google DeepMind, and will continue to do so.

Jeff Dean heads for Discovery Loop

Separately, Dean is leaving Google after what Pichai described as an “incredible 27-year run”. He is joining Sanjay Ghemawat, Quoc Le and Oriol Vinyals to create Discovery Loop, an independent public benefit corporation intended to automate machine learning, science and engineering experiments.

Discovery Loop plans to begin by automating large-scale machine learning experiments internally, before applying its approach to fields including biology, drug discovery, materials design and chip architecture. Its seed round has not yet closed, but Radical Ventures and Khosla Ventures are co-leading it, with Lightspeed, Kleiner Perkins, Doerr Capital and Alphabet also participating. The company has not disclosed a funding total or valuation.

Alphabet will remain closely connected to the spinout. Pichai said Google would support Discovery Loop as a founding investor and Cloud partner. The four founders have collectively spent nearly a century at Google, with work spanning systems such as Google File System, MapReduce, BigTable and Spanner, as well as TensorFlow, TPUs, AlphaFold, Gemini and other major AI projects.

A difficult moment for Gemini

The reshuffle lands as Google faces intense pressure to turn its AI research into faster-moving consumer and business products. Google says the Gemini app now has more than 950 million monthly users, while its Gemma open models have exceeded 900 million downloads. Yet Gemini 3.5 Pro, the company’s next flagship model, is reportedly months behind its original June launch target, and Google did not provide a replacement date in its announcement.

Hassabis referred to ongoing work on “Gemini 4”, without offering specifics. Google DeepMind is also contending with competition from Anthropic and OpenAI, both of which have recruited prominent Google AI researchers in recent months. Dean’s departure is particularly notable because he is leaving to build an independent company rather than joining a rival lab.

Investors reacted sharply to the news. Alphabet shares reportedly fell as much as 5.4% during the session, with the decline later narrowing, while the company shed close to $180 billion in market value within hours. The market reaction reflects concern about talent departures, but the two moves are not identical: Hassabis is staying inside Alphabet in a more strategic role, while Dean is leaving outright.

What happens next

For users, the key question is whether Kavukcuoglu’s clearer operational mandate helps Google deliver Gemini updates more reliably. The new structure gives Hassabis more room to pursue AGI, health and scientific research, while putting a single executive in direct charge of Gemini’s product, developer and research operations. Google has not announced a new timeline for Gemini 3.5 Pro, so the practical test of the shake-up will be what arrives next.