A federal court trial in Oakland, California, begins as Elon Musk pursues a claim against OpenAI and its leaders, alleging that the company’s history and public commitments involve wrongdoing tied to OpenAI’s original nonprofit structure. Musk accuses OpenAI CEO Sam Altman, OpenAI President Greg Brockman, and Microsoft of steering the project away from its founding intent, including manipulating Musk into making a donation that later enabled creation of a for-profit subsidiary. Several outlets describe the lawsuit as centering on whether OpenAI was transformed in a way that violated promises made at its inception, and what responsibilities leaders held toward OpenAI’s mission. Testimony is also described as addressing control and governance disputes in OpenAI’s early years. Accounts say Altman testifies that Musk sought greater control, including efforts discussed to merge OpenAI’s nonprofit lab into Tesla, which Altman says would have undermined the lab’s nonprofit status. OpenAI’s legal team argues Musk waited too long to sue and that the nonprofit model could not support the resources needed for OpenAI’s goals, while attorneys for Musk challenge the credibility of Altman and dispute how investments and later financing influenced the shift toward a scaled, for-profit structure.