The courtroom in Oakland, California, became the stage for one of the most anticipated legal showdowns in AI history last week. Elon Musk is suing Sam Altman and OpenAI, claiming the company betrayed its original nonprofit mission. Our reporter, Michelle Kim, a lawyer herself, has been present daily. Here's what she saw and what it all means.

What exactly is Musk alleging against Altman and OpenAI?

Elon Musk's lawsuit claims that Sam Altman and OpenAI president Greg Brockman breached the company's charitable trust. He argues that when he donated millions to fund OpenAI around 2015, it was explicitly for a nonprofit research lab, not a for-profit corporation. Musk asserts that OpenAI has since abandoned that mission by restructuring into a for-profit entity. He's asking for several remedies, including massive damages and the removal of Altman. His primary demand is to unwind the October 2025 restructuring deal with the attorneys general of California and Delaware, which gave the nonprofit less daily control. Musk wants to stop that plan entirely, arguing it violates the original promise.

How is OpenAI defending itself?

OpenAI's defense rests on the claim that Elon Musk knew and agreed to the creation of a for-profit arm from the start. They argue that building advanced AI is extraordinarily expensive, and Musk himself recognized that purely nonprofit funding wouldn't suffice. Emails and early board discussions are expected to show that Musk was involved in conversations about spinning off a for-profit entity to attract investment. OpenAI's lawyers will try to prove that Musk was not deceived—he simply changed his mind after leaving the company. The key legal question is whether Musk can prove he was misled, and if so, when he discovered the alleged misconduct.

Why is the statute of limitations a major issue?

For charitable trust claims, a lawsuit must be filed within three to four years of discovering the alleged breach. Musk left OpenAI in 2018 but didn't sue until 2024. So the court is trying to determine when Musk actually knew that OpenAI had shifted to a for-profit model. Musk's team paints a picture of gradual suspicion, claiming he only fully realized in 2022 that the mission had changed. OpenAI, however, argues that Musk was aware much earlier—perhaps as early as 2019 when the for-profit arm was formally launched. If the judge agrees with OpenAI, Musk's case could be dismissed on that technicality alone, regardless of the merits.

What has the atmosphere been like in the courtroom?

The room has been tense, with both camps staring each other down. Outside, protesters held signs like “AI for all, not for profit,” reflecting a broader public unease about AI's direction. Inside, the testimony has been a mix of cringey texts and raw diary entries. Attendees describe moments of awkward silence when old messages—full of ambition and backroom deals—are read aloud. The trial is unfolding against a backdrop of growing cultural backlash against AI, with many feeling that no matter who wins, society loses. The judge has occasionally called for order, but the spectacle of two tech titans in a federal court has drawn a packed gallery each day.

What key evidence has emerged so far?

Early exhibits include text messages from 2015–2017 where Musk discusses monetizing OpenAI's technology and even suggests a for-profit structure. These could backfire on Musk, showing his early buy-in. On the other hand, whistleblowers have produced internal OpenAI memos that suggest Altman downplayed profit motives in early pitches to donors. The most dramatic moment so far was when a diary entry from an OpenAI co-founder was read aloud, revealing personal tensions between Musk and Altman over control. Also revealed was a slide deck from 2016 that described OpenAI as a nonprofit “that may later form a for-profit.” That phrase is now central to the dispute.

What happens next in the trial?

Week two is expected to bring more high-profile witnesses, including former OpenAI board members and possibly Altman himself. The judge will also hear arguments on the statute of limitations. If Musk survives that hurdle, the case will move to a deeper examination of OpenAI's financial restructuring. A ruling on the charitable trust claim could come within weeks, but appeals are likely. Meanwhile, OpenAI's IPO plans remain on hold, pending the outcome. The trial is being closely watched by investors and tech executives—if Musk wins even partial relief, it could force OpenAI to restructure again, potentially resetting its valuation and delaying its public offering.