Elon Musk made ‘hair-raising’ demands for control of OpenAI, Sam Altman testifies
Start-up’s CEO takes the stand in legal battle with billionaire
Start-up’s CEO takes the stand in legal battle with billionaire

Testimony from billionaire’s confidante Shivon Zilis reveals wrangling over the future of the AI lab that led to lawsuit

Lawsuit brought by Elon Musk heads into final week in court, with Sam Altman due to testify

Billionaire says Sam Altman wanted ‘halo effect’ of a non-profit while enriching himself in second day of his testimony

Text exchange revealed in court filings came after world’s richest man tried to start last-minute settlement talks

The world’s richest man has lost in cases ranging from shareholder fraud to claims that his rivals stole AI secrets

Opening arguments kick off legal battle over whether the $850bn start-up sold out its non-profit mission