Google AI's two pillars were shaken on the same day: Jeff Dean left to start a business, Gemini changed coaches to face the critical period Google AI experienced a rare major personnel shock

Google AI's two pillars were shaken on the same day: Jeff Dean left to start a business, Gemini changed coaches and faced a critical period. Google AI experienced a rare personnel shock. DeepMind head Demis Hassabis announced that he would step down from daily management responsibilities and become chairman of DeepMind and chief scientist of Alphabet. At almost the same time, Jeff Dean, chief scientist of Google, announced the end of his nearly 27-year career at Google and co-founded a new company, Discovery Loop, with three senior researchers. Alphabet shares fell nearly 4% in one day after the news was announced. Hassabis transfers positions but does not leave, Gemini 4 is still moving forward Hassabis did not leave the company, but moved from organizational manager to long-term strategist and chief scientific advisor. He said that his new position will allow him to devote more energy to the direction of AGI, basic scientific breakthroughs and global AI governance, while continuing to participate in Isomorphic Labs’ AI drug research and development work. DeepMind's daily management will be taken over by current CTO Koray Kavukcuoglu, who has worked with Hassabis for more than 13 years and has participated in representative projects such as WaveNet and DQN. Gemini model development, cutting-edge AI research and related teams are all included in his management scope. Hassabis revealed in an open letter that the new generation model Gemini 4 is advancing and the project is progressing well. Jeff Dean took away half of the history of AI technology, and Google invested in a new company. Compared with Hassabis's "internal transfer", Jeff Dean's departure caused a greater shock. Dean joined Google in 1999. From early search infrastructure to MapReduce, BigTable, TensorFlow, and TPU, he has been directly connected with many key technologies of Google over the past two decades. Along with him, there are three heavyweights who left to start a business: distributed system expert Sanjay Ghemawat, Gemini technical lead Oriol Vinyals and Google Brain early member Quoc Le - the four people have jointly participated in projects covering AlphaFold, AlphaStar, AlphaCode and Gemini. Discovery Loop