Google is remaking the leadership of its artificial intelligence operation, and losing the engineer who built much of its technical foundation in the process. The company said Wednesday that chief scientist Jeff Dean is leaving after 27 years to co-found Discovery Loop, a startup aimed at automating scientific and engineering research, and that Google will participate as a founding investor and cloud partner.

The announcement came through a memo from Alphabet chief executive Sundar Pichai posted to the company’s blog, and it reordered the top of Google’s AI structure in a single stroke. Demis Hassabis, chief executive of Google DeepMind, is stepping out of that role to become chairman of the unit and chief scientist of Alphabet, while continuing to run Isomorphic Labs, the company’s AI drug discovery arm. Koray Kavukcuoglu, DeepMind’s chief technology officer, is being elevated to senior vice president and will take charge of Gemini model development. Kavukcuoglu will report directly to Pichai and oversee frontier AI research, the Gemini app and Google’s AI developer platforms.

Investors did not take it quietly. Alphabet shares fell to a session low of down 5.4% following reports of the shakeup. The stock touched $381.81 before the news broke and bottomed at $355.16 afterward, later steadying near $360.71 against Tuesday’s close of $375.35 — a swing that erased close to $190 billion in market value.

Four Departures, Not One

Dean is not going alone, and that is what turned an executive exit into a market event. Joining him are Sanjay Ghemawat, a Google senior fellow; Oriol Vinyals, a vice president at DeepMind; and Quoc Le, a co-founder of Google Brain. Discovery Loop’s own site describes the four as including three of the most-cited researchers in AI and two of the most-cited in distributed systems, with work spanning Google Search, Google Translate, MapReduce, BigTable, Spanner, TensorFlow, TPUs, AlphaFold and Gemini.Dean was Google’s 30th employee and had served as chief scientist since the 2023 merger of Google Brain and DeepMind.

He is 58, and told University of Washington computer science graduates in June that he had first caught the startup itch in 1999, when Google had 20 people and offices above what is now a T-Mobile store in Palo Alto.“After an incredible 27-year run, Jeff Dean is at a moment where he wants to try something new, and we’re excited to support him in that,” Pichai wrote

, adding that the pair would work on speeding up discoveries in machine learning, science and engineering.

What Discovery Loop Is Building

The new company is a public benefit corporation — a for-profit structure whose directors must weigh a stated mission alongside returns. The plan starts narrow: automating machine learning research and testing the tools on itself first, with medicine, solar energy and cybersecurity to follow. Radical Ventures and Khosla Ventures are co-leading the seed round, which has not closed; the startup declined to disclose a valuation. Dean said the name reflects the notion that the cycle of forming a hypothesis, running an experiment and evaluating results can be handed to machines. “Particularly in a lot of domains, you can fully computerize that whole loop,” he said.Ghemawat said the group wanted infrastructure built to different requirements than what Google maintains for its consumer and advertising products.

A Pattern Google Cannot Afford

The timing lands on top of an already difficult stretch for Google’s research bench. Alphabet stock fell as much as 7% in late June after Noam Shazeer, a co-lead on the Gemini models, left for OpenAI and Nobel laureate John Jumper departed DeepMind for Anthropic within days of each other. Both OpenAI and Anthropic are approaching public offerings and can offer pre-IPO equity that a publicly traded Alphabet cannot structurally match.

For shareholders, the arrangement cuts two ways. Because Discovery Loop remains tied to Alphabet through investment and cloud computing, the startup could become a significant Google Cloud customer and an investment asset whose technologies might eventually be licensed or acquired — meaning the departure creates real retention concerns while also handing Alphabet a stake in an ambitious effort to automate discovery.The reshuffle comes as Google races OpenAI and Anthropic on frontier models while pouring capital into the infrastructure its cloud division needs to serve customers.

Kavukcuoglu now owns Gemini’s next chapter, Hassabis moves to long-range strategy, and the engineer who built the plumbing underneath all of it is starting over — with Google’s money behind him.

JBizNews Desk | Mountain View, California

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