Elon Musk called himself a "fool" in court, warned of a "Terminator" future, and admitted that xAI taps OpenAI's models for its own AI training. Week one of Musk's trial against Sam Altman delivered plenty of drama; and the best may still be ahead.

Elon Musk sued OpenAI, Sam Altman and Greg Brockman in 2024, claiming they reneged on their promise to keep the artificial intelligence lab a nonprofit.

Altman faces off against Musk, his OpenAI co-founder, in second day of high-stakes lawsuit