Sam Altman and Greg Brockman, the leaders of ChatGPT-maker OpenAI, sat in an Oakland, California courtroom on Tuesday as former collaborator and one-time mentor Elon Musk testified that the pair conspired to try to “steal a charity.

Elon Musk took the stand for a second day of testimony against OpenAI and its leaders in a lawsuit that could reshape the future of artificial intelligence, as the emerging technology has sent ripples...

Elon Musk’s second day testifying at trial was far from boring.