Google AI Shake‑up: Brin Takes Direct Control of Gemini as Hassabis Steps Back

Jeff Dean, a long‑time Google technical legend, announced his departure after 27 years, prompting widespread tributes across social media.

According to the Financial Times, Google is conducting a large‑scale AI leadership overhaul, citing information from more than a dozen current and former employees.

Co‑founder Sergey Brin will now intervene directly in the Gemini project, while DeepMind co‑founder Demis Hassabis relinquishes daily management duties. Former DeepMind chief technology officer Koray Kavukcuoglu has been appointed senior vice president responsible for Gemini model research, development, and operations.

Hassabis will become Alphabet’s chief scientist and chair of Google DeepMind, focusing on long‑term AI research, including work at his AI‑driven drug‑discovery startup Isomorphic Labs.

The core of the reorganization is moving the AI decision centre from London back to Silicon Valley. Kavukcuoglu has already relocated to the Mountain View campus, working next to Brin, who, although lacking a formal executive title, has been increasingly involved in AI affairs since the rise of ChatGPT, influencing Gemini testing and roadmap decisions.

Commercial pressure underlies the changes: Gemini 3 and the Nano Banana image‑editing tool helped Google regain market attention, but the company now faces the challenge of rapidly turning model capabilities into developer tools, enterprise services, and stable revenue streams, especially as OpenAI and Anthropic have already secured early‑mover advantages.

The new management structure gives Kavukcuoglu daily control over Gemini development, aiming to shorten decision cycles, accelerate model releases, and improve product rollout speed.

Some senior Google executives have expressed dissatisfaction with Hassabis’s level of commercial involvement; AlphaFold is cited as a controversial case where a groundbreaking scientific achievement did not generate commercial returns proportional to its investment.

The leadership shift has caused internal unrest at DeepMind, with staff fearing that Hassabis’s research‑centric culture may be diluted. Jeff Dean’s exit further amplifies these concerns; he and three long‑time colleagues are founding Discovery Loop, a startup that will use AI to automate scientific and engineering experiment cycles, with Google providing support.

Following the announcement, Alphabet’s stock fell roughly 5%, reflecting investor anxiety about talent turnover and the gap between AI infrastructure spending and revenue growth.

The new command hierarchy assigns Hassabis to long‑term scientific research and AGI, Kavukcuoglu to Gemini R&D and delivery, Brin to strategic judgment and product push, and Sundar Pichai to enforce speed and maintain competitive edge.

Success will depend on the coordination of three routes: preserving exploratory research space, speeding up model iteration, and finding paying customers for the product side. Future competition will be judged on code‑generation tools, enterprise market penetration, product experience, and commercial revenue rather than solely on academic papers or model rankings.