Lawyers for Elon Musk and OpenAI began closing arguments Thursday in the landmark trial whose outcome could shape the future of artificial intelligence.
Barbara Ortutay And Matt O'Brien Sam Altman, center, and OpenAI president Greg Brockman, right, arrive at the U.S. District Court in Oakland, Calif. , Thursday, April 30, 2026.
William Savitt, attorney representing OpenAI, left, speaks during a press conference outside the U.S. District Court in Oakland, Calif. , Thursday, April 30, 2026. Sam Altman, center, and OpenAI president Greg Brockman, right, arrive at the U.S. District Court in Oakland, Calif. , Thursday, April 30, 2026.
Musk, the world's richest man, was a co-founder of OpenAI, the company that launched in 2015 and went on to create ChatGPT. After Musk invested $38 million in its first years, his lawsuit filed in 2024 accusedOne of the jury’s tasks is to decide if Musk filed his lawsuit in time.
Much of the testimony has centered on OpenAI’s early years after its 2015 founding, but there’s a relatively short timeline to allege the claims Musk is making of breach of charitable trust and unjust enrichment. The judge wrote in a court filing last month that “if the jury finds that Musk failed to file his action within the statute of limitations, it is highly likely” that she will “accept that finding and direct verdict to the defendants.
” If the jury decides that the lawsuit was filed in time, they then have to decide if OpenAI had a “charitable trust” and that OpenAI and its executives broke that trust. Musk's other claim means jurors must determine whether Altman, Greg Brockman — co-founder and president — and OpenAI unjustly enriched themselves at Musk's expense. For Microsoft, a co-defendant in the trial, the jury has to decide whether the company aided and abetted that breach.
Musk's attorney, Steven Molo, told jurors Thursday morning that the Tesla CEO is “sorry he could not be here. ”O'Brien reported from Providence, Rhode Island. Copyright 2026 The Associated Press. All rights reserved.
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