A significant trial starts today in Oakland, California. Billionaires Elon Musk and Sam Altman are at odds over OpenAI's evolution. Musk claims OpenAI betrayed its mission, becoming a 'wealth machine'. He seeks $150 billion in damages and wants OpenAI to revert to a nonprofit. Key figures like Musk, Altman, and Microsoft's Satya Nadella are expected to testify.