OAKLAND, CALIFORNIA - APRIL 30: Stuart J. Russell, a computer science professor at UC Berkeley and authority on AI, arrives to court at the Ronald V. Dellums Federal Building on April 30, 2026 in Oakland, California. Elon Musk invested in OpenAI early on believing it would be a non-profit, but is now suing OpenAI and its CEO Sam Altman for allegedly deceiving him by developing OpenAI into a for-profit company. (Photo by Benjamin Fanjoy/Getty Images)