A benefactor to OpenAI's co-founders – to whom he gave $38 million from 2015 to 2017 – Elon Musk accuses CEO Sam Altman and his partner Greg Brockman of betraying the startup's charitable mission by transforming it into a commercial company valued at more than $850 billion and poised to go public.

Elon Musk says he’s suing to save the company’s mission. The case could have huge consequences for OpenAI and the AI race.

Arguments in the trial over Elon Musk's lawsuit against OpenAI and CEO Sam Altman for becoming a for-profit company begin in California on Tuesday.