Musk vs. Altman, Week One: Three Days of Testimony That Put OpenAI's Future on Trial

For three days in late April 2026, the most powerful man in technology sat in a federal courtroom in Oakland, California, and told a jury that he had been robbed. Not of money alone, but of a charity he said he created for the benefit of humanity — and that OpenAI's leaders had turned into a machine for personal enrichment.

The first week of Musk v. Altman delivered everything courtroom drama promises: a billionaire plaintiff on the stand for days, a judge cutting off talk of AI apocalypse, and opening statements that framed the case as a battle for the soul of the most valuable startup in the world. By the time the week ended, the legal stakes were clear — and so was the fact that the trial's outcome could reshape OpenAI's future at the worst possible moment for the company.

What Happened in Week One

The trial began on Monday, April 27, 2026, with the selection of a nine-member jury at the U.S. District Court for the Northern District of California. Opening statements followed on Tuesday, and Elon Musk — the world's wealthiest person — took the witness stand the same day as the plaintiff's first witness.

Musk's lead attorney, Steven Molo, set the tone in his opening statement, telling the jury that OpenAI had been created "for the benefit of all mankind" and that Sam Altman, OpenAI's CEO, and Greg Brockman, its president, had effectively stolen it. OpenAI's lead attorney, William Savitt, offered the opposing narrative: Musk sued because he "didn't get his way."

Then Musk testified for three consecutive days, from Tuesday through Thursday. Under friendly questioning from his own lawyer, he walked the jury through his version of OpenAI's founding — and delivered the soundbite that would define the week:

"If we make it OK to loot a charity, the entire foundation of charitable giving in America will be destroyed."

By Thursday, the judge had had enough of the existential framing. Yvonne Gonzalez Rogers cut off Musk's testimony about AI doomsday scenarios, steering him back to the facts of the case — a moment that captured the tension between Musk's grand narrative and the court's narrower concerns.

The Story Musk Told the Jury

Musk's testimony painted OpenAI as his idea, born from a fear that Google was not taking AI safety seriously enough. He told the jury he decided to create a nonprofit AI lab after conversations with Google co-founder Larry Page, whom he said labeled him "a speciesist for being pro-human" during a dispute about the risks of artificial intelligence.

"I could have initiated it as a for-profit venture, but I opted not to," Musk testified, casting the nonprofit structure as a deliberate choice rather than an accident of history.

He also detailed his financial contributions. Musk said he provided roughly $38 million to OpenAI in its early years, and testified that he used his connections to secure computing capacity — personally approaching Microsoft CEO Satya Nadella and Nvidia CEO Jensen Huang.

"I was a fool who provided them free funding to create a start-up," he said on the second day of testimony. "I gave them $38 million of essentially free funding to create what would become an $800 billion company."

Notably, Musk conceded that he was not opposed to a for-profit arm inside OpenAI from the start. "I wasn't against having a small for-profit to fund the non-profit," he testified, "as long as it didn't become the dominant force." He said he ultimately left OpenAI in 2018 because the other founders demanded too much equity in the for-profit entity and the process had become "too annoying."

Microsoft's Role Looms Over the Case

While Altman and Brockman are the named individuals in the lawsuit, the case's third major player is Microsoft. Musk's amended complaint accused Microsoft of aiding and abetting the alleged breach of charitable trust, and the company's massive investment in OpenAI — which has totaled over $13 billion — is central to the claim that OpenAI abandoned its nonprofit mission for profit.

Microsoft CEO Satya Nadella was expected to testify later in the trial, along with Altman and Brockman. His testimony would carry particular weight: Musk has claimed he personally approached Nadella to secure compute for OpenAI in its early days, while Microsoft's lawyers were expected to argue that the company's partnership with OpenAI was a straightforward commercial arrangement.

The first week also included testimony from Jared Birchall, who oversees Musk's family office, called to detail Musk's specific donations to OpenAI and his broader financial commitments.

Why the First Week Mattered

The opening week of a civil trial rarely decides the outcome, but it shapes the narrative the jury carries into deliberations. Musk's three days on the stand accomplished two things:

• It personalized the case. By putting the world's richest man on the stand first, Musk's team made the trial about his story — the founding vision, the betrayal, the $38 million — rather than about the legal technicalities that would ultimately doom his claims.
• It aired the evidence. Confidential emails, text messages, and even Greg Brockman's personal diary entries entered the public record during the week, giving the press a steady stream of revelations regardless of how the jury would eventually rule.

The trial was expected to last about three weeks, with Altman, Brockman, Nadella, and several early OpenAI researchers and engineers still to take the stand.

What's at Stake for OpenAI

The case against OpenAI was dismissed on statute-of-limitations grounds when the jury returned its verdict on May 18, 2026 — but in that first week, the stakes could not have been higher.

Musk's lawsuit sought as much as $150 billion in damages and demanded that Altman and Brockman be removed from their positions and OpenAI returned to nonprofit status. A judgment against OpenAI would have threatened the company's reported plans for an initial public offering — widely expected to be one of the largest listings in history, with analysts citing a potential valuation around $1 trillion.

The trial also arrived amid heightened scrutiny of OpenAI's governance. A memo from former CTO Mira Murati, released during the proceedings, criticized aspects of Altman's leadership style, and the company's chaotic board dynamics — including Altman's brief ouster and reinstatement in November 2023 — were explored on the stand. Even a victory in court could not undo the documentary damage the trial exposed.

The Bigger Lesson

The first week of Musk v. Altman was a masterclass in how civil litigation in the technology industry has become a form of theater with real corporate consequences. The trial pitted two of the most famous founders in the world against each other over the question of what a company's founding mission means once the money starts flowing.

For OpenAI, the week was a preview of its most difficult challenge yet: defending its transformation from a nonprofit research lab into a commercial juggernaut in front of a jury, in the press, and — most importantly — in the public record. Emails and diary entries introduced in that first week will be quoted for years, regardless of the verdict.

For the wider tech industry, the lesson is simpler. When founders fall out, the documents follow — and in the AI era, where the stakes are measured in trillions, the fallouts are only getting bigger. The first week of this trial proved that the fight over OpenAI's soul was never just about the past. It was about who would control the most consequential technology of the decade, and the courtroom was just one arena where that war would be fought.