tl;dr: Demis Hassabis is stepping back from day-to-day operations at Google DeepMind to become Chair of GDM and Chief Scientist of Alphabet, focusing on AGI strategy and Isomorphic Labs. Koray Kavukcuoglu, currently CTO, will take over as SVP of Google DeepMind, overseeing Gemini development and frontier research. Separately, Jeff Dean is leaving after 27 years to launch an independent public benefit corporation with Sanjay Ghemawat aimed at accelerating ML and science research, with Google as a founding investor.