OpenAI chief Sam Altman is testifying in a trial involving Elon Musk, with some reports indicating that Altman stated Musk wanted control of OpenAI, possibly seeking a 90 percent stake. Altman has denied accusations of betraying Musk and defended OpenAI's for-profit push. The trial appears to involve disputes over the direction and ownership of OpenAI, with Musk's lawyers questioning Altman's honesty during his testimony.