Published
July 14, 2026
Two of tech's biggest names spent a year and a half fighting over who betrayed OpenAI's founding promise — and it took a jury less than two hours to end the first round in Altman's favor. The war is far from over.
Verdict on Some Claims · Others Still Unproven
The jury resolved Elon Musk's fraud and contract claims on timing (the statute of limitations) — it did not find that OpenAI or its executives actually did anything wrong, and Musk has said he will appeal. A separate set of antitrust and unfair-competition claims against OpenAI and Microsoft has not been decided; those remain unproven allegations that the defendants deny. This page is informational and is not legal advice.
What Happened?
On May 18, 2026, a federal advisory jury in Oakland, California sided with OpenAI CEO Sam Altman, co-founder Greg Brockman, and OpenAI in the long-running lawsuit brought by Elon Musk, one of the company's original co-founders. After less than two hours of deliberation, the jury found that Musk's fraud, breach-of-contract, and related claims were barred by the statute of limitations — in plain terms, that he waited too long to sue. U.S. District Judge Yvonne Gonzalez Rogers adopted the advisory verdict.Importantly, the jury never reached the heart of Musk's case. It did not decide whether Altman and OpenAI actually betrayed the company's founding promise to build artificial intelligence as an open, nonprofit effort "for the benefit of humanity." The verdict turned entirely on timing, not on whether the underlying allegations were true. Musk and his co-plaintiff, his AI company X.AI Corp., said they would appeal to the Ninth Circuit U.S. Court of Appeals, arguing in part that a legal theory known as the "continuing violation" doctrine should extend the filing window because the alleged conduct continued over years.
Status
Jury Verdict for OpenAI — Musk to Appeal
Fraud & contract claims found time-barred · antitrust claims still pending
Case
Musk v. Altman · No. 4:24-cv-04722-YGR
U.S. District Court, N.D. California (Oakland) · Judge Yvonne Gonzalez Rogers
What's Next
Musk plans to appeal to the Ninth Circuit
Antitrust claims against OpenAI & Microsoft still to be briefed into late 2026
The Backstory: A Co-Founder's Falling-Out
Musk was one of eleven co-founders of OpenAI, which launched in 2015 as a nonprofit. According to his complaint, Altman and Brockman courted him by presenting the venture as a safety-focused counterweight to Google's AI efforts, promising that its technology would be developed openly and "for the good of the world," not for private profit. Musk says he lent his name, recruited top scientists, and contributed roughly $44 million to OpenAI between 2016 and 2020. He left OpenAI's board in early 2018.Musk's lawsuit alleged that once OpenAI's technology grew valuable, Altman — in partnership with Microsoft — allegedly built an "opaque web" of for-profit entities, locked down the technology, and steered the organization away from its charitable mission. OpenAI and its executives have consistently denied those characterizations. The company has argued that its structure was designed to raise the enormous capital needed to pursue advanced AI while keeping its mission intact, and it countersued Musk in April 2025, alleging his own conduct was a bad-faith effort to slow a competitor.
Musk first filed suit in San Francisco Superior Court in February 2024, then refiled a federal complaint on August 5, 2024. The full 2024 federal complaint — laying out his fraud, contract, RICO, and false-advertising theories against Altman, Brockman, OpenAI, and its affiliated entities — is embedded below.
Read the Complaint
How the Case Narrowed Before Trial
The case changed shape considerably on its way to a jury. In May 2025, Judge Gonzalez Rogers trimmed the complaint, cutting claims including false advertising and breach of fiduciary duty while allowing fraud and unjust-enrichment claims to move forward. That same spring, the California Attorney General declined to join Musk's suit, and OpenAI brought its own counterclaims against him.The dispute also unfolded against real-world corporate change at OpenAI. In October 2025, the company restructured into a public-benefit corporation, OpenAI Group PBC, with its original nonprofit retaining roughly a 26% stake and Microsoft holding about 27%. Musk had earlier sought to block a for-profit conversion, arguing it violated the terms under which he contributed — a request the court viewed skeptically.
What's Still Alive: The Antitrust Claims
The May 2026 verdict did not end the litigation. A separate group of claims — antitrust and unfair-competition allegations against OpenAI and Microsoft — was carved out for its own briefing phase and was not put to the jury. Court filings show these remaining claims include federal Sherman Act and Clayton Act theories, California's Cartwright Act and Unfair Practices Act, the state Unfair Competition Law, and a Lanham Act claim.Under a schedule the parties submitted in June 2026, OpenAI and Microsoft were each set to file opening briefs on the remaining claims by August 10, 2026, with Musk's opposition due September 24, 2026 and reply briefs by October 26, 2026. Musk was also ordered to answer OpenAI's counterclaims by August 10, 2026. In its June 10, 2026 order, the court signaled concern about whether these remaining causes of action can survive "given the fierce competition in the AI field." In other words, the antitrust fight is far from a sure thing for Musk, and it will be resolved on the briefs rather than by the same jury.
Why This Verdict Matters
The stakes reach well beyond a soured friendship between two of tech's most powerful figures. Musk's suit was the most prominent attempt yet to force OpenAI back toward its original nonprofit, open-source promise, and the verdict lifts — at least for now — one of the largest legal clouds hanging over Altman as OpenAI pushes deeper into commercial territory. Because the jury ruled on timing rather than the merits, the central question of whether OpenAI abandoned its founding mission is left formally unresolved, and Musk's appeal will try to keep it alive.The fight also lands amid a fast-growing body of litigation over OpenAI and its products. OCA keeps a running tracker of the lawsuits and class actions against OpenAI and ChatGPT, including copyright suits and a ChatGPT privacy class action, and has covered the Florida Attorney General's action over ChatGPT and Apple's trade-secret lawsuit against OpenAI.
And the money in AI litigation is already moving elsewhere: OpenAI rival Anthropic agreed to a landmark $1.5 billion authors' copyright settlement, a marker of just how high the financial stakes in these cases have climbed.
Frequently Asked Questions
Who won the Musk v. Altman lawsuit?
On May 18, 2026, a federal advisory jury sided with Sam Altman and OpenAI, and Judge Yvonne Gonzalez Rogers adopted the verdict. The jury found that Musk's fraud, contract, and related claims were barred by the statute of limitations — that is, filed too late. The jury did not decide whether OpenAI actually abandoned its founding mission.What did Elon Musk accuse OpenAI and Sam Altman of?
His complaint alleged that Altman and Greg Brockman induced him to help fund and launch OpenAI as a nonprofit devoted to safe, open AI, then allegedly abandoned that mission by building a for-profit structure tied to Microsoft. OpenAI and its executives deny the allegations, and no court has found them liable on those claims.What does the verdict mean for OpenAI and Sam Altman?
It lifts, at least for now, one of the most prominent legal threats to OpenAI's for-profit transformation and to Sam Altman personally. Because the jury ruled on timing rather than the merits, it did not endorse OpenAI's conduct — but it lets the company keep moving forward while Musk pursues an appeal.Is the case completely over?
No. Musk and X.AI Corp. said they will appeal to the Ninth Circuit. Separately, antitrust and unfair-competition claims against OpenAI and Microsoft were not decided by the jury and are being briefed on a schedule running into late 2026.Sources
• NPR — "Jury dismisses all claims in Elon Musk's lawsuit against OpenAI CEO Sam Altman": NPR• CNBC — "Musk slams Altman trial verdict as a 'technicality,' vows to appeal": CNBC
• NBC News — "Jury throws out Elon Musk's lawsuit against OpenAI and Sam Altman in less than two hours": NBC News
• Musk v. Altman, No. 4:24-cv-04722-YGR (N.D. Cal.) — 2024 federal complaint (PDF): Complaint
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Status
Jury Verdict for OpenAI (Fraud/Contract) — Antitrust Claims Pending
Case Title
Musk v. Altman (Elon Musk & X.AI Corp. v. Samuel Altman, et al.)
Case Number
4:24-cv-04722-YGR
Court
U.S. District Court, N.D. California (Oakland Division)
Judge
Hon. Yvonne Gonzalez Rogers
Verdict Date
May 18, 2026
Complaint
Read the 2024 Complaint (PDF)
