OpenAI cofounder John Schulman leaves ChatGPT maker for rival Anthropic

"This choice stems from my desire to deepen my focus on AI alignment, and to start a new chapter of my career where I can return to hands-on technical work," Schulman said in his X post. OpenAI's President and cofounder Greg Brockman is also taking a sabbatical through the end of the year, he said in a X post late Monday.