Google on Tuesday reshuffled the leadership of its artificial-intelligence operations, elevating Demis Hassabis to a broader role at Alphabet while handing day-to-day control of Google DeepMind to his longtime deputy, and parting ways with chief scientist Jeff Dean, who is leaving to start a company.
Hassabis, who has led DeepMind since Google acquired the London lab in 2014, will become chairman of Google DeepMind and chief scientist of Alphabet, the company said. Koray Kavukcuoglu, Google’s chief AI architect and a senior vice president, will take over most of Hassabis’s responsibilities. The announcement also confirmed that Dean, who spent 27 years at Google, will leave alongside Google fellow Sanjay Ghemawat to found an independent venture focused on accelerating discovery in machine learning, science and engineering. The new firm, called Discovery Loop, is organized as a public benefit corporation.
The changes give Google’s AI operation a clearer succession story at the top while testing whether the company can hold its position in a race it has been running from behind. DeepMind’s models sit at the center of Gemini, the family of systems that Google has woven into Search, Android and its cloud business, and the lab’s research pipeline is widely considered among the strongest in the industry. The question is whether the management shuffle disrupts that pipeline at a moment when competitors are moving quickly.
Hassabis’s elevation keeps him inside the company while freeing him from the daily demands of running the lab. As Alphabet chief scientist, he will advise across the parent company’s many AI efforts, and as DeepMind chairman he keeps a seat at the table where Gemini’s direction is set. Colleagues said the arrangement suits a researcher who has always been more interested in the science than the org chart.
Kavukcuoglu is the continuity pick. A DeepMind veteran who worked on the early deep-learning research that produced AlphaGo, he rose through the lab’s ranks and later became Google’s chief AI architect, overseeing the systems that tie the company’s research to its products. People familiar with the decision said he was chosen for his grasp of both the research and the engineering, the combination that Google believes it needs to keep Gemini competitive. His promotion is a bet that the bench is deep.
Dean’s departure is the sharper loss. The engineer who co-created MapReduce with Ghemawat, led the development of TensorFlow and served as chief scientist while the company built its largest language models is one of the most recognizable names in computer science. His exit ends a 27-year run and removes a figure who, more than anyone else at Google, embodied the company’s research credibility. The stock fell 4% on the news, erasing about $186 billion in market value.
The reshuffle also closes a chapter in the history of DeepMind itself. The lab was founded in 2010 by Hassabis, Shane Legg and Mustafa Suleyman, acquired by Google in 2014 and became famous three years later when AlphaGo defeated the world champion at the ancient board game Go. Hassabis and colleague John Jumper won the Nobel Prize in Chemistry in 2024 for AlphaFold, a system that predicts protein structures. Suleyman left years ago to found Inflection and now runs Microsoft’s AI division. With Dean and Ghemawat departing, the founding generation that built the field’s most influential lab is now scattered across the industry.
Analysts said the changes will be judged by what ships next. Gemini’s next releases, the pace of integration into Google’s consumer products and the performance of its cloud AI business will determine whether the reshuffle reads as a strengthening of leadership or a sign of instability. One industry analyst said the key question is whether the people now in charge can keep the research-to-product pipeline moving at the speed the market demands.
The moves also carry a message for investors. Google has spent two years answering the challenge posed by OpenAI and Microsoft, and its AI products have gone from defensive to competitive. Elevating Hassabis, promoting Kavukcuoglu and letting Dean go on amicable terms suggests management believes the difficult part is over. The market, at least on Tuesday, was not so sure.
For Kavukcuoglu, the promotion is the biggest test of his career. For Hassabis, the new role trades control for scope. For Google, the arrangement settles, for now, the question of who runs its AI. Investors will judge it by the models that arrive next, and by whether the departures of Dean and Ghemawat turn out to be the end of an era or the beginning of a problem.
People familiar with the matter said the company has been preparing for the possibility of senior departures for more than a year, building a pipeline of researchers trained to step into leadership roles. Google has also made it more expensive for rivals to poach its engineers, with compensation packages that vest over long periods. Whether that is enough will show up in the next round of Gemini releases and in the company’s ability to hire the researchers who want to work on the most ambitious problems in the field. For now, the reshuffle is a bet on institutional depth over individual star power, and the market’s verdict on Tuesday was a modest vote of confidence: down 4%, but no worse.
