OAKLAND, California. The jury is in.

Federal Judge Yvonne Gonzalez Rogers seated nine jurors in Musk v. Altman on Monday afternoon, ending a day of voir dire that started with prospective jurors openly admitting they did not like Elon Musk and ended with both sides agreeing they could pick a fair panel anyway. Opening arguments begin Tuesday morning.

Then come three weeks of testimony that will, in roughly equal measure, decide who really owns OpenAI, expose how the company actually got built, and serve as live court TV for the entire technology industry.

Musk's lawyers told the court in January their client believes he is owed up to $134 billion in what they call 'wrongful gains.' That is the number to watch when the press starts running headlines this week. It is also the floor, not the ceiling, of what a Musk win would actually cost OpenAI. The company's foundation owns roughly 26% of the for-profit. Unwinding the conversion would not just transfer cash, it would unwind the legal entity that just renegotiated a $135 billion deal with Microsoft last week.

The Stakes

Two claims survived to trial after Musk dropped his fraud allegations on Friday: unjust enrichment and breach of charitable trust. The first asks the jury to decide whether Altman and Greg Brockman talked Musk into bankrolling a nonprofit they always intended to flip. The second asks whether OpenAI's 2024 conversion to a for-profit cap structure violated the original charitable mission Musk paid to seed.

The remedies Musk wants are not subtle. He has asked the court to remove Altman and Brockman from leadership, unwind the for-profit conversion, and award damages. Judge Gonzalez Rogers will decide remedies herself with the jury serving in an advisory role. Liability is the jury's job. The remedies phase is currently scheduled to begin May 18.

Witnesses Who Built the Industry

The witness list is the part that turns this from a contract dispute into a public archive. Musk and Altman are both expected to take the stand. So is Microsoft CEO Satya Nadella, who has spent the last month renegotiating the very alliance Musk says was the betrayal. Mira Murati, Ilya Sutskever, and Shivon Zilis are also expected. Brockman is on the list and is presumed to be the most consequential witness on either side.

Brockman's 2017 personal diary will be entered into evidence. In it he reportedly wrote that the nonprofit framing was 'a lie' even as the founders were publicly committing to it. If Musk's lawyers can put that in front of jurors and have Brockman explain it under oath, the unjust enrichment claim writes itself. If Brockman can frame it as a private moment of doubt that did not reflect actual intent, OpenAI's defense writes itself.

Either way, that document is the closest thing this trial has to a smoking gun.

What Else Comes Out

Discovery has already produced internal communications neither side wanted public. Altman's February 2023 text calling Musk his 'hero' is now part of the record. So is the email chain showing Musk pushing in late 2017 for OpenAI to be folded into Tesla, with Musk himself as CEO. The defense will use that email exactly the way every Altman ally has used it on X for two years: to argue Musk did not leave OpenAI over a betrayal of mission, he left because he could not control it.

There is no clean version of this story. Both men were, by the available evidence, telling slightly different versions of the truth to different audiences in 2017 and 2018. The jury's job is to decide whose version of that selectively-honest period is closer to legal truth.

The Prediction Markets

Kalshi has Musk's odds of winning at 45% as opening arguments begin. That is high enough that nobody at OpenAI is sleeping well, low enough that nobody at Tesla is celebrating. The interesting tell is that the odds barely moved when Musk dropped the fraud claims Friday. Traders concluded the dropped claims were the weakest part of the case. The unjust enrichment and charitable trust theories were always the harder ones to defend against.

Why It Matters Beyond OpenAI

Every nonprofit-to-for-profit AI lab is watching this. Anthropic is filing for an IPO this fall as a public-benefit corporation that started life with safety-first messaging and billions in mission-aligned capital. xAI was always for-profit but started with similar rhetoric about openness. The legal precedent on charitable trust enforcement against AI labs is being written in this courtroom this week.

Three weeks. Two founders. One jury. Microsoft's CEO under oath. The witness on the stand whose private diary called the whole thing a lie. Whatever you think of Musk or Altman, this is the most consequential courtroom in technology since US v. Microsoft in 1998.

Live updates start Tuesday at 9 a.m. Pacific. Set an alert.

Source: AP News (court coverage), CNBC (jury seating, Musk's $134B claim), Reuters (jury selection, witness list), The Guardian (trial preview, Nadella witness confirmation), NBC News (stakes analysis), NPR (case overview).