The trial of Musk versus Altman began its closing arguments in a federal courthouse in Oakland on May 14, 2026.

Elon Musk is alleging in an ongoing lawsuit that Sam Altman lied to him and other co-founders and investors, and unjustly enriched himself.

Sam Altman is unlikely to testify in the OpenAI trial during the current week because Shivon Zilis, Elon Musk's business partner, is scheduled to testify the following day.