A three-week courthouse battle between Elon Musk and Sam Altman over OpenAI's nonprofit-to-for-profit shift exposes how a shared mission to build AI safely devolved into personal attacks, character assassination, and a $150 billion lawsuit that reveals deep rifts in Silicon Valley's AI race. Musk and Altman co-founded OpenAI in 2015 as a nonprofit to develop AI safely for humanity, but split acrimoniously in 2018 when Altman and Brockman pivoted toward a for-profit structure requiring billions in investment.