Trial continues after heated back and forth during OpenAI’s cross-examination of the Tesla CEO on Wednesday

Elon Musk’s court case against Sam Altman continues on Thursday, after a day of contentious exchanges during OpenAI’s cross-examination of the Tesla CEO. Musk will face another round of questioning before his lawyer calls more witnesses, including OpenAI’s president, Greg Brockman.

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 account on the origins of Musk and Altman’s bitter feud. Altman is set to testify later in the trial, which will last three weeks.

Musk, who co-founded OpenAI in 2015, is arguing that Altman, Brockman and OpenAI broke a foundational agreement when they shifted the company from a non-profit intent on bettering humanity into a for-profit structure. Musk claims that Altman and Brockman unjustly enriched themselves and should be removed from the company. He is also seeking the undoing of the for-profit conversion and $134bn in damages to be redirected to OpenAI’s non-profit arm.