Elon Musk testified that he texted Sam Altman, "what the hell is going on," after learning about Microsoft's $10 billion ...

Sam Altman and Elon Musk are facing off in a high-stakes trial that could alter the future of OpenAI and its most well-known ...

Elon Musk took the stand for the second day for his attempt to legally dismantle OpenAI.

Elon Musk said in his second day of testimony that he was “a fool” for funding OpenAI. Mr. Musk grew combative during ...

OpenAI put Musk on the defensive in the second day of trial, questioning how much he knew about the company's trajectory from a nonprofit to a for-profit.

Emails going as far back as 2015 give a glimpse into the foundations of OpenAI and the early tensions at the company.

Musk's second day of testimony grew testy at times, as OpenAI’s lawyers sought to portray the Tesla tycoon as an unreliable ...

Elon Musk spent hours Wednesday telling a jury about his falling out with the other leaders of OpenAI over what he described ...

Elon Musk told the court he was misled about OpenAI’s non-profit mission, as he seeks massive damages and challenges its ...

The former friends and co-founders are now battling in court over whether Altman broke OpenAI's nonprofit mission and ...

Elon Musk testifies in lawsuit accusing OpenAI, Sam Altman, Greg Brockman and Microsoft of abandoning nonprofit mission, ...

Elon Musk returns to witness stand in OpenAI trial over nonprofit shift, Microsoft ties, and $150 billion lawsuit.