Demis Hassabis is giving up the manager's chair. Alphabet said Wednesday that the DeepMind co-founder will step away from running Google's AI division day to day — twelve years after he sold his London lab to Google, and three years after he took charge of the company's combined AI effort. He'll chair Google DeepMind and take a brand-new title, Alphabet chief scientist. He isn't the only name on the door changing, either.
The quiet promotion
Day-to-day control passes to Koray Kavukcuoglu, DeepMind's longtime chief technology officer. Worth noticing: he gets senior vice president, not CEO, and he keeps his other hat as Alphabet's chief AI architect. Reuters reports that leaders inside Google Cloud — where Google actually earns its AI money — cheered the pick. Kavukcuoglu was already the DeepMind executive closest to Cloud's work, and the expectation is that Gemini development now tilts harder toward product.
Hassabis put his reasoning in a staff memo: AGI is close, he believes, and he wants to shape what comes next. Sundar Pichai backed him up, writing that the two had been "long discussing a role that allows him to put his full attention on actively shaping the future of AGI."
Four exits that sting
Announced the same day: Jeff Dean, Sanjay Ghemawat, Oriol Vinyals and Quoc Le are leaving to start Discovery Loop, a public benefit corporation chasing research breakthroughs in machine learning, science and engineering. That roster hurts. Dean co-founded Google Brain in 2011 and built — with Ghemawat — the core infrastructure Google still runs on. Vinyals and Le helped write the 2014 paper that made large-scale pre-training the foundation of modern AI. Google isn't burning the bridge, though: it invested in Discovery Loop, and Google Cloud will sell the startup compute.
"Google has a deep bench of talent but losing these four individuals will leave a mark for some time," Zacks Investment Management strategist Brian Mulberry told Reuters.
About that timing
Alphabet didn't say why everything moved at once, but the backdrop is hard to miss. The flagship Gemini upgrade — Hassabis called it Gemini 4 in his memo — still hasn't shipped despite a June target. Wall Street noticed the wobble; Alphabet stock dropped 4% on the news. And the talent bleed predates this week: Noam Shazeer went to OpenAI in June, and John Jumper — who shared a Nobel with Hassabis in 2024 — said days later he'd join Anthropic.
There's a competitive story here too. Gemini 3 landed last November and genuinely closed the gap with OpenAI and Anthropic. Then rivals kept moving, cheap Chinese open-source models piled on, and by Google's May developer conference the pitch had shifted from "smartest model" to "best price."
Where Demis goes
His new lane is deliberately roomy: strategy and research on how AGI reshapes society, with few direct reports. He also gets more time for Isomorphic Labs, the DeepMind drug-discovery spinout he founded and still runs. "I've always believed the No. 1 application of AI should be to improve human health," he wrote — up to and including, he hopes, helping cure cancer.
What to watch
The bet underneath the reshuffle is simple: an operator-led, product-first DeepMind ships faster than a scientist-led one. Maybe so. But the people who defined Google's AI decade are now advisors, competitors or alumni — and the first real referendum arrives whenever Gemini 4 does.
Image: panumas nikhomkhai, via Pexels
