The most consequential courtroom drama in AI history kicked off today in an Oakland federal courthouse. Elon Musk — world’s richest person, OpenAI co-founder — versus Sam Altman, the CEO who turned that nonprofit research lab into an $850 billion juggernaut. Between them: a nine-person jury, thousands of pages of internal documents, and a question that could define how artificial intelligence is governed for decades.

Opening arguments started this morning. This one’s going to be messy.

From Co-Founders to Courtroom Enemies

Rewind to 2015. Musk and Altman co-founded OpenAI as a nonprofit with a pitch so clean it practically glowed: build powerful AI in the open, counterbalance Google’s growing dominance, benefit humanity instead of shareholders. Musk contributed tens of millions.

Then it all fell apart.

Musk left the board in 2018 — the reasons depend on who’s telling the story. Musk says he had concerns about the organization’s direction. OpenAI’s side says he wanted to fold the company into Tesla and got turned down. By 2019, Altman had created a “capped profit” entity and started bringing in outside investment. ChatGPT launched in late 2022, and overnight, the nonprofit research lab became one of the most valuable startups on Earth.

Musk watched from the sidelines, launched rival xAI in 2023, then filed suit in 2024. His core claim: Altman and co-founder Greg Brockman conned him into investing by promising a nonprofit mission they never intended to keep.

What Musk Wants

The numbers are staggering. Musk is seeking roughly $150 billion in damages from OpenAI and Microsoft, with proceeds directed to OpenAI’s charitable arm. His lawyers calculated this by taking OpenAI’s valuation and multiplying it by the 50-75% of the nonprofit’s stake they attribute to Musk’s contributions.

But money’s not the only ask. He also wants:

  • OpenAI reverted to a nonprofit structure — undoing years of corporate restructuring
  • Sam Altman and Greg Brockman removed from their positions
  • Altman kicked off the board entirely

A co-founder who left eight years ago is trying to decapitate the leadership of a company valued at nearly a trillion dollars. Whether this reads as principled whistleblowing or a billionaire’s grudge match depends entirely on which internal documents you find most compelling.

The Diary Entry That Could Decide Everything

Among thousands of pages unearthed in discovery, one stands out. In fall 2017, Greg Brockman wrote in his personal diary:

“This is the only chance we have to get out from Elon. Is he the ‘glorious leader’ that I would pick?”

That single entry encapsulates the tension at OpenAI’s core. Was Musk a generous benefactor being betrayed? Or an overbearing figure the other founders needed to escape?

OpenAI’s defense is straightforward: Musk is rewriting history. They argue he was involved in discussions about creating a for-profit structure, never delivered the full $1 billion he pledged, and that his real motivation is competitive — propping up xAI by hamstringing the rival he inadvertently helped create.

“This lawsuit has always been a baseless and jealous bid to derail a competitor,” OpenAI posted on X on Monday.

Musk fired back: “I started it, funded it, recruited critical talent.”

Why the Judge Split the Trial

Judge Yvonne Gonzalez Rogers made an unusual call: splitting the trial into two phases. First, liability — did OpenAI’s leadership actually defraud Musk? The jury weighs in, but their verdict is only advisory. The judge makes the final call.

If liability is found, a second phase determines remedies. This matters because even if the jury sides with Musk, the judge retains full discretion over damages and structural changes.

The liability phase should wrap by May 21st. The witness list reads like a tech industry yearbook: Musk, Altman, Brockman, and potentially Microsoft CEO Satya Nadella.

The jury dynamics are already fascinating. During selection, prospective jurors openly expressed negative views about Musk. One said, “Elon doesn’t care about people.” The judge acknowledged it directly: “The reality is people don’t like him.” The final nine — including a nurse and a painting company owner — said they could be fair despite their opinions.

The IPO Shadow

This trial doesn’t exist in a vacuum. OpenAI is widely expected to pursue an IPO, and a weeks-long trial airing dirty laundry about founding disputes, leadership ego trips, and corporate restructuring could chill investor enthusiasm at the worst possible moment.

Meanwhile, Musk is preparing to take SpaceX public in what could be a record-breaking IPO of its own. He also merged xAI with SpaceX earlier this year, further entangling his business interests with his legal claims against OpenAI.

The drip-drip of unflattering internal communications — diary entries questioning leadership, emails about control, debates about mission drift — could damage both sides. But OpenAI arguably has more to lose. Public trust in AI companies is already fragile.

Can a Nonprofit Mission Survive Billions of Dollars?

Beyond the personalities, this trial raises the question the entire AI industry should be grappling with: what happens when idealism meets economics?

OpenAI’s origin story was compelling because it was different. A nonprofit, open-source research lab building AI for everyone. But training frontier models costs hundreds of millions of dollars. You can’t do that on donations.

OpenAI’s solution — the capped-profit structure, then the full corporate restructuring completed last October — was pragmatic. It was also exactly the kind of mission drift Musk is alleging. The question isn’t whether OpenAI changed. It obviously did. The question is whether Musk was deceived about that change, or whether he was part of the conversation and simply lost the argument.

If Musk wins: Nonprofit-to-profit conversions in AI become legally vulnerable. Other AI organizations think twice about restructuring. Musk — who runs a direct competitor — gains enormous influence over OpenAI’s governance. And OpenAI’s IPO takes a serious hit.

If OpenAI wins: The pivot-to-profit model gets validated. Early investors can’t retroactively block corporate evolution. And the biggest obstacle to OpenAI’s IPO vanishes.

AI Governance on Trial

Strip away the billionaire drama, and this case is really about who decides how the most powerful technology in history gets developed. Musk’s argument, at its core, is that AI is too important for profit motives. Altman’s counter is that you need massive capital to compete, and capital demands returns.

Both are right. That tension — mission versus money, idealism versus pragmatism — is the central challenge facing every serious AI organization today. This trial won’t resolve it. But for the next four weeks, it’ll put it under a very bright spotlight.

The courtroom is in session. This one’s worth watching.