Noam Shazeer, a vice president of engineering at Google and co-lead of its Gemini AI models, leaves the company to join OpenAI, according to multiple outlets. Shazeer announces the move himself, and reports describe him as a key figure behind Gemini and as an early contributor to technologies that underpin modern large language models. Several sources also note his background: he first joined Google in the early 2000s, later left to co-found and lead Character.AI, and then returned to Google in 2024. OpenAI CEO Sam Altman publicly welcomes Shazeer’s hire, describing it as a long-awaited acquisition of talent. Google officials characterize the decision as difficult, with a vice president of engineering stating he is moving on after Shazeer’s departure. The announcement comes amid an ongoing competition among AI companies for specialized research and engineering talent. One outlet reports Google paid about $2.7 billion to rehire Shazeer, and other coverage frames his exit as occurring less than two years after that return. The sources agree on the main point: Shazeer’s transition from Google to OpenAI.