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Google chief scientist Jeff Dean leaving in AI reshuffle after 27 years at company

Google is backing the new public benefit corporation as Dean leaves after 27 years and four senior researchers join him.

  • On Wednesday, Alphabet announced a major leadership overhaul of its AI division, triggering a 4% selloff in shares to $361 in afternoon trading.
  • DeepMind CEO Demis Hassabis transitions to Alphabet chief scientist and chairman, while technology chief Koray Kavukcuoglu assumes day-to-day operations; longtime chief scientist Jeff Dean and three senior colleagues depart simultaneously.
  • Dean and colleagues are launching Discovery Loop, a public benefit corporation focused on science and engineering, with Alphabet serving as founding investor and cloud partner.
  • Investors fear the reshuffle signals a "brain drain" at a delicate moment, as Google trails rivals OpenAI and Anthropic; the flagship Gemini model remains unreleased despite a planned June launch.
  • Despite Wednesday's drop, Alphabet shares remain up 16% year to date; market attention shifts to the Gemini Pro release, which prediction markets place at 76% probability by August 31.
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The leadership of Google's AI organization has been reorganized, with key AI researchers such as Jeff Dean leaving and Demis Hassabis moving to become a senior scientist at Alphabet. With the delay in the launch of the latest model, Gemini, coupled with a successive loss of talent, significant pressure is being placed on Google to recover its technological competitiveness and secure product execution capabilities within the AI market.

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ddaily.co.kr broke the news on Tuesday, August 4, 2026.
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