The trial between Elon Musk and OpenAI, Sam Altman, Greg Brockman, and Microsoft opened April 28 in the Ronald V. Dellums US Courthouse in Oakland, California. Musk took the stand on day one, testifying that he co-founded and funded OpenAI specifically because it was structured as a charity โ and that he would never have contributed his resources had the founders intended to build a profit-seeking corporation. The trial is being watched across the AI industry because its outcome could have consequences that extend well beyond the specific dispute between Musk and Altman.
What Musk Is Arguing
Musk’s legal case centers on the founding charter of OpenAI, dated 2015, which declared the organization would seek to create “open source technology for the public benefit” and was “not organized for the private gain of any person.” His lawyers entered the original charter into evidence and displayed it for the jury.
“I came up with the idea, the name, recruited the key people, taught them everything I know, provided all the initial funding,” Musk testified. “It was specifically meant to be for a charity that did not benefit any individual person.”
Musk’s core legal claim is that OpenAI’s conversion from a nonprofit to a for-profit structure โ and the billions in equity that Altman, Brockman, and other insiders stand to gain from that conversion โ constitutes a breach of the charitable trust under which OpenAI was founded. He is asking the court to unwind the for-profit conversion, or at minimum require that OpenAI’s commercial proceeds be directed toward charitable purposes consistent with the original mission.
OpenAI’s Defense
OpenAI’s lead attorney William Savitt argued in opening statements that Musk knew about the company’s commercial evolution well before filing suit โ citing a September 2020 post in which Musk wrote that “OpenAI is essentially captured by Microsoft.” The defense argues the statute of limitations on Musk’s claims has expired, and that the for-profit transition was disclosed publicly and known to Musk years before he chose to file.
Microsoft is also named as a defendant. Microsoft’s attorney Russell Cohen argued that his client did not and could not have aided OpenAI’s alleged breach of a charitable trust, and that Musk’s claims against Microsoft exceed the statute of limitations.
The Irony at the Center of the Case
The trial’s most striking subtext is what Musk has done with his own AI ventures since leaving OpenAI’s board. He founded xAI in March 2023 as a public benefit corporation โ and then shed those PBC commitments in 2024. He merged xAI with X in 2025, and into SpaceX this year. Both SpaceX and OpenAI are simultaneously racing toward IPOs while investor interest in AI remains high. Musk is asking a court to hold OpenAI to the charitable structure he himself has systematically dismantled across his own companies โ a contradiction that OpenAI’s attorneys are expected to surface prominently during cross-examination.
The Timing Could Not Be Worse for Altman
The trial opened the same day the Wall Street Journal published its report that OpenAI had missed revenue and user targets โ sending the market into a significant sell-off across AI infrastructure stocks. Altman was reportedly not present in the courtroom for portions of Musk’s testimony, as the two men now occupy the same building at the same time for the first time since their relationship broke down.
OpenAI’s CFO has reportedly expressed concern that the company is not organizationally ready for the Q4 2026 IPO that Altman has been planning. The trial itself adds another layer of uncertainty: an adverse ruling could impose structural constraints on OpenAI’s corporate form at precisely the moment it needs maximum flexibility to complete a public offering and fund its $600 billion in compute commitments.
What the Outcome Could Mean
Legal observers note that the most likely outcomes range from a dismissal on statute of limitations grounds to a settlement that involves some form of charitable contribution or governance concession from OpenAI. A full unwinding of the for-profit structure โ the most aggressive remedy Musk is seeking โ is considered unlikely given how deeply OpenAI’s commercial relationships are now embedded in its corporate structure.
But the trial’s longer-term consequence may be less about the specific remedy and more about the precedent it sets for mission-driven AI companies. If Musk prevails on any significant claim, it establishes that public commitments made in founding charters carry legal weight โ a finding that could affect how every AI company with a stated mission frames its commercial evolution going forward.
Conclusion
The Musk v. OpenAI trial is the most consequential courtroom confrontation the AI industry has produced. Whatever its outcome, it is surfacing questions about governance, mission, and commercial accountability at frontier AI labs that the industry will be grappling with long after the verdict. Browse our directory to explore ChatGPT and every major AI tool at the center of the industry this trial is putting on trial.
