Google's vice president of engineering and a co-lead of its Gemini AI models Noam Shazeer announced Wednesday that he was leaving the company to join OpenAI. "I'm excited to share that I'll be joining OpenAI and look forward to working with the exceptional team there," Shazeer said in a post on X . "It was a difficult decision to move on. I'm incredibly proud of the amazing team at Google and everything we've built together. It has been an honor and a pleasure to work with all of you," he added.