Elon Musk is suing Sam Altman and OpenAI for $134 billion. Here's everything that happened, from a haunted mansion in San Francisco to a text message that broke the internet.

If you've been anywhere near tech Twitter — or, well, the internet in general — over the past few weeks, you've probably heard about the lawsuit that reads less like a legal filing and more like a Silicon Valley season finale. Elon Musk is suing Sam Altman, Greg Brockman, OpenAI, and Microsoft for up to $134 billion. The closing arguments wrapped up on May 14, 2026, in a federal courthouse in Oakland. And the story that emerged from the discovery process? It involves haunted mansions, whiskey served by Amber Heard, a painting of a Tesla, and one of the most viral text messages in tech history.
So — did Sam Altman actually steal OpenAI? Let's walk through the whole thing, from the very beginning.
The first phase of the Musk v. Altman trial concluded in federal court in Oakland, California, on Thursday, after attorneys for both sides delivered their closing arguments to a nine-person jury made up of six women and three men. The jury's role here is a bit unusual — their verdict will be advisory, meaning Judge Yvonne Gonzalez Rogers will make the final call on liability. CNBC
The cast of characters reads like a who's who of the AI world: Musk, Altman, OpenAI president Greg Brockman, former chief scientist Ilya Sutskever, former CTO Mira Murati, and Microsoft CEO Satya Nadella. Jurors heard from some of the biggest names in AI, and the case is proceeding differently than most — a separate portion of the trial, held in front of the judge alone, will determine what damages should be imposed if the ruling ultimately favors Musk. Axios
The stakes couldn't be higher. The outcome of the trial could upend OpenAI's race toward an IPO at a valuation approaching $1 trillion. No pressure. MIT Technology Review
To understand what Musk is actually angry about, you need to go back to 2015. That's when Musk, Altman, Brockman, Sutskever, and others founded OpenAI as a nonprofit — its stated mission being to develop artificial intelligence safely, for the benefit of humanity. Musk donated $38 million. The vision was genuinely idealistic, however naive it may look in hindsight.
Then things got complicated. OpenAI pulled off a structural maneuver that would define the entire lawsuit: they bolted a for-profit subsidiary onto the nonprofit shell. Microsoft entered with a $1 billion investment, and OpenAI is now approaching a valuation of nearly $1 trillion. Musk, who had left the board in 2018, watched all of this from the outside — and eventually, he couldn't take it anymore. MIT Technology Review
In his testimony, Musk repeatedly argued that his OpenAI cofounders Sam Altman and Greg Brockman took his $38 million in donations and "stole the charity" out from under him. "Without me, OpenAI would not exist," Musk testified. "I came up with the name. I came up with the idea." The San Francisco Standard
His demands? He's asking the court to remove Altman and Brockman from their roles and to unwind the restructuring OpenAI undertook last year, which converted its for-profit subsidiary into a public benefit corporation. He is also seeking as much as $134 billion in damages from OpenAI and Microsoft. MIT Technology Review
Here's where the story gets genuinely unhinged — in the best possible way.
In August 2017, an AI model built by OpenAI beat the world's best human players at the video game Dota 2. It was a landmark moment. Musk was electrified. He hosted a gathering at his "Haunted Mansion" near San Francisco — a 16,000-square-foot house in the South Bay where he liked to throw parties. MIT Technology Review
The house was splattered with confetti and cups, Brockman recalled, and the actress Amber Heard, who was Musk's girlfriend at the time, served whiskey. "Time to make the next step for OpenAI. This is the triggering event," Musk wrote in an email. MIT Technology Review
What Musk had in mind for that "next step" was significant. Over the next six weeks, Brockman said, Musk and the other cofounders had intense discussions about creating a for-profit entity to raise enough capital to build artificial general intelligence. According to Brockman's testimony, Musk wanted to lead that for-profit entity — as CEO, with majority control. MIT Technology Review
The other cofounders pushed back and proposed equal equity instead. It did not go well. According to Brockman, Musk stood up, stormed around the table, and grabbed a painting that Sutskever had commissioned as a peace offering. He started to walk out — then turned around and asked, coldly: "When will you be departing from OpenAI?"
Six months later, Musk stopped making donations and left the OpenAI board.
This moment is critical because it directly undercuts Musk's central narrative. OpenAI's attorney Sarah Eddy argued in her closing that Musk abandoned OpenAI in 2018 when he left the company, and that witnesses repeatedly testified Musk did not condition his donations on keeping it a nonprofit. She similarly claimed that Musk was more interested in being named CEO of OpenAI than in continuing to operate it as a nonprofit. Yahoo Finance
In other words: Musk didn't object to OpenAI going for-profit. He objected to OpenAI going for-profit without him running it.
While all of this internal drama was playing out, Microsoft was quietly making moves that would reshape the entire AI landscape.
Satya Nadella wasn't always a true believer. Early on, he was skeptical about the actual value of what OpenAI was building. But he eventually doubled down — hard. His fear? He didn't want Microsoft to become the next IBM, while OpenAI became the next Microsoft. That's a sentence that has aged remarkably well. The San Francisco Standard
Microsoft ultimately invested $13 billion into OpenAI, cementing a partnership that Musk's legal team argued amounted to aiding and abetting a breach of charitable trust. Musk later added Microsoft to the suit, saying it aided and abetted OpenAI's breach of its obligations. Axios
Nadella testified during the trial. His take on the chaos that unfolded at OpenAI in 2023? He reportedly called the whole situation a "sort of amateur city" — which, honestly, is a fair description.
No recap of this saga is complete without the most dramatic subplot: Sam Altman getting fired in November 2023 — and then getting his job back five days later.
The exchange between Altman and then-CTO Mira Murati began on November 19, 2023 — two days after the board had abruptly fired Altman as CEO, citing a loss of confidence in his leadership. Altman, scrambling for information, texted Murati while she was in a board meeting: "Can you indicate directionally good or bad?" OfficeChai
Murati texted back: "Directionally very bad" — and a catchphrase was born. The Ringer
During his testimony, Altman recalled the chaos. "I was in this fog of war," he said. "I didn't know what was going on." He said he feared that "everything I had worked so hard to build was going to get destroyed." The Ringer
The reinstatement came fast. The employee revolt turned out to be exactly what broke the board. More than 700 OpenAI employees signed a letter threatening to resign and follow Altman to Microsoft. Even Ilya Sutskever — the chief scientist who had orchestrated the ouster — signed it. Within five days, Altman was back as CEO. OfficeChai
It's worth noting that Sutskever later said he deeply regretted his role in the firing. Murati herself left OpenAI in late 2024 to found her own AI company. And the board members who voted Altman out? They were replaced.
The entire episode — the firing, the revolt, the reinstatement — painted a complicated picture at trial. Musk's lawyers pointed to Altman's ouster as evidence of a pattern of dishonesty. Altman's team framed it as a failed coup that proved, ultimately, how indispensable he was.
In his closing statement, Musk's attorney Steven Molo repeatedly hammered on witness testimony related to Altman's trustworthiness, arguing: "Sam Altman's credibility is directly at issue in this case… If you cannot trust him, if you don't believe him, they cannot win. It's that simple." Yahoo Finance
Molo also referenced Altman's testimony that Musk mused about wanting to control a 90% stake in OpenAI and turning the company over to his children if he died without a succession plan in place. Yahoo Finance
On the other side, OpenAI's lawyers argued that Musk is suing because he didn't get his way and is now trying to undermine a competitor to his own AI company, xAI. Axios
Honestly? Both sides land some blows. And both sides have things to answer for.
Here's the honest answer: probably not Elon.
Prediction markets on Polymarket currently give Musk a 32% chance of winning his case against Sam Altman, with $398,000 traded on the question. The odds of him winning a settlement of $10 billion or more? Traders put that at just 9%. PolymarketPolymarket
The legal hurdles are real. Yes, what happened to OpenAI's nonprofit mission is genuinely troubling. But Musk's own conduct in 2017 — actively pushing for a for-profit structure with himself as majority shareholder — makes it very hard to argue he was betrayed by the very idea of going for-profit. There was also never a binding contract that OpenAI would remain a nonprofit forever. And then there's the fact that Musk admitted under oath that xAI distills OpenAI's models — which makes the entire lawsuit feel less like a principled stand for charitable missions and more like a move to slow down a competitor. MIT Technology Review
The final decision rests with Judge Yvonne Gonzalez Rogers. She showed little patience for any shenanigans from lawyers during the trial, repeatedly chiding representatives for both parties when they stepped out of line. Whatever she decides, this case has already done something no press release ever could: it's pulled back the curtain on how these companies are actually built — through ego, ambition, group chats, and the occasional haunted mansion party. CNBC
The jury begins deliberations on Monday. We'll be watching.
Want to stay updated on the Musk v. Altman verdict? [INTERNAL LINK: OpenAI news and updates] Bookmark this page — we'll cover the ruling as soon as it drops.

About the author
Akhilesh Kumar writes about AI, tech culture, and the ideas driving the next era of the internet. His work breaks down complex stories for readers who want depth without the noise.
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