Elon Musk testified for three days this week in his lawsuit against OpenAI, presenting evidence that the company betrayed its nonprofit mission by converting to a for-profit model. Emails, texts, and Musk's own tweets have surfaced in court as he argues that CEO Sam Altman violated the organization's founding principles. The case centers on Musk's claim that OpenAI abandoned its original nonprofit structure, which he helped establish. More witnesses are expected to testify as the legal battle continues. The lawsuit represents a significant dispute between Musk and his former ally Altman over the direction and governance of one of AI's most prominent organizations. Evidence presented in court includes private communications that illustrate disagreements over the company's structural and philosophical shift. The trial has drawn attention from the tech industry, highlighting ongoing tensions about how AI companies should be organized and whether for-profit conversion undermines commitments to public benefit.