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The Guardian - US
The Guardian - US
Technology
Dara Kerr in Oakland and Nick Robins-Early

Judge cuts off Musk’s AI doomsday talk as his testimony ends in OpenAI case

a man in a suit holding a phone looks off to the side as a man stands behind him leaning on a sign
Elon Musk arrives at court during proceedings in the trial over his lawsuit against OpenAI in Oakland, California, on 30 April 2026. Photograph: Josh Edelson/AFP/Getty Images

Elon Musk’s court case against Sam Altman continued on Thursday, after a day of contentious exchanges during OpenAI’s cross-examination of the Tesla CEO. Musk faced more combative questioning throughout the morning, in a glimpse of what may await other prominent witnesses set to take the stand.

Witness testimony and evidence has revealed formerly private emails, text messages and diary entries surrounding the formation of OpenAI, giving a behind-the-scenes look at how the tech behemoth was created. Many of the tech industry’s most powerful players are named as witnesses and will give their accounts on the origins of Musk and Altman’s bitter feud. Altman will testify later in the trial, which will last three weeks.

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