Google Just Reorganized the People Building Gemini — While Gemini Itself Is Months Late

On Wednesday, August 5, Alphabet announced two things at once. The first was a reorganization: Demis Hassabis, who has run Google DeepMind since its founding, is handing over day-to-day control of the lab. The second was a departure: Jeff Dean, Google’s chief scientist and a 27-year veteran, is leaving the company — and taking three of its most senior researchers with him.

Either item alone would have been a significant day for Google. Together, on the same day, they landed on a company whose flagship model is already overdue. Gemini 3.5 Pro was targeted for June. It is still not out. Alphabet shares fell more than 4% on the news.

The company’s framing is that both moves are voluntary, amicable, and forward-looking. That framing is probably accurate. It is also incomplete, because it does not address the question investors were actually asking.

What Changed at the Top

Hassabis is not leaving Alphabet. He is moving up and sideways: he becomes chairman of Google DeepMind and takes a newly created role as chief scientist of Alphabet. In his own words, the change is deliberate rather than forced.

His stated focus going forward is strategic and global issues in AI, the science applications of the technology, and Isomorphic Labs — the drug discovery company he founded out of DeepMind and still leads as CEO, and which he has called the top application of AI for improving human health. Sundar Pichai’s public comment was unreserved: “It’s work that is vitally important to Alphabet and humanity, and I can’t imagine a better person than Demis to do it.”

Operational control passes to Koray Kavukcuoglu, previously DeepMind’s chief technology officer and Alphabet’s chief AI architect. He now runs the lab day-to-day and oversees Gemini model development, including the unreleased Gemini 4.

The detail worth pausing on is his title. Kavukcuoglu takes over as senior vice president of Google DeepMind — not as CEO — and reports directly to Pichai. The CEO title, and the semi-independent posture that came with it, has effectively been retired. DeepMind spent a decade as a lab with its own identity inside Google. It is now a division of Google reporting to the CEO of Google, run by a senior vice president.

The Four Who Left Together

Jeff Dean joined Google in 1999, roughly its 30th employee. He is not a manager who happened to accumulate seniority; he is a person whose engineering work is embedded in the foundations of the company and, by extension, much of the modern internet. Twenty-seven years later he is leaving to become CEO of a startup called Discovery Loop.

He is not going alone. Sanjay Ghemawat, a Google senior fellow and Dean’s collaborator across decades of the company’s core infrastructure, is a co-founder. So is Oriol Vinyals, a senior research scientist at Google DeepMind who worked at the center of the Gemini effort. So is Quoc Le, a founding member of Google Brain. Reporting on the shakeup described the departures as including leaders of the Gemini program itself.

Discovery Loop is structured as a public benefit corporation, and its premise is that AI should be pointed at the scientific process rather than at chat. Dean described the goal as automating the experimental loop end to end:

The funding tells you how the split is being handled. The initial round is co-led by Radical Ventures and Khosla Ventures, with Kleiner Perkins, Lightspeed and Doerr Capital participating. Alphabet is a founding investor and the startup’s cloud compute provider. Pichai’s statement matched: “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.”

That is not the posture of a company losing people in a fight. Google funded the exit and sold it compute. But an amicable departure and a costly departure are not opposites — the four people leaving are still gone from the Gemini org, and Google now owns equity in their attention instead of their time.

This Is the Second Wave, Not the First

The August 5 announcement did not come out of nowhere. In late June, within days of each other, two more senior figures left:

• Noam Shazeer, who co-led the Gemini models — and who Google had paid a widely reported fortune to bring back in the first place — left for OpenAI.
• John Jumper, who shared the 2024 Nobel Prize in Chemistry with Hassabis for AlphaFold, left Google DeepMind for Anthropic.

Add the four Discovery Loop founders and that is six senior researchers out in roughly six weeks, from the single most scrutinized model program in the industry. Two went straight to Google’s two closest competitors.

The Delay Underneath All of It

Gemini 3.5 Pro was planned for June. It is months past that and has not shipped. Google has not published a revised date. In his memo, Hassabis pointed past it, citing great progress on Gemini 4 — a model that also does not exist publicly.

That is the awkward shape of this announcement. A company that is shipping on schedule can restructure leadership and be read as confident. A company that is late reorganizes and gets read as reacting. Google is in the second position, and the reading is not unfair: the competitive gap it is being measured against — OpenAI and Anthropic, both shipping frontier models on a visible cadence — is the exact gap the missing model was supposed to close.

It is worth being precise about what is not known. Nobody outside Google has said the delay caused the reorg, and the two events are consistent with a much duller explanation: Hassabis has been drifting toward AGI strategy and Isomorphic for a while, Dean is 27 years in and wanted to build something, and the calendar collided. Alphabet funding Discovery Loop is evidence for the dull explanation, not against it.

What to Take From This

• The CEO title is gone, and that is the structural change. Google DeepMind is now run by an SVP reporting to Pichai. Whatever independence the lab retained from the 2023 merger, it retains less of it today.
• Kavukcuoglu is not an outside pick. He was DeepMind’s CTO and Alphabet’s chief AI architect. Continuity on the technical side is the one thing this reorg clearly preserves.
• Six senior researchers in six weeks is the number that matters. Shazeer to OpenAI, Jumper to Anthropic, and four to a startup of their own. Any single one is a story about a person. Six is a story about a place.
• Google chose to fund its own brain drain. Alphabet is a founding investor in Discovery Loop and provides its compute — a hedge that keeps a strand of the relationship alive, and an admission it could not keep them inside.
• None of it ships a model. Gemini 3.5 Pro is still late, Gemini 4 is still unannounced, and no reorganization changes either fact this quarter.