What’s actually slowing this PC down?
Pick the symptom - the matching free tool is one click away.
Elon Musk did sue OpenAI and Sam Altman “again,” but not in August 2026. The lawsuit behind that wording was filed on August 5, 2024, after Musk withdrew an earlier California case. It went to a federal jury trial in spring 2026, and the jury rejected Musk’s claims on May 18, 2026, finding that he had brought them too late under the applicable statute of limitations.
The case was Musk v. Altman et al., No. 4:24-cv-04722-YGR, in the U.S. District Court for the Northern District of California. The court’s case page identifies the parties and filings: official docket.
What “again” means
The headline refers to a refiling, not a newly filed lawsuit in August 2026.
- February 2024: Musk filed an initial California state-court action against OpenAI and Altman.
- June 2024: He withdrew that case shortly before a scheduled hearing.
- August 5, 2024: Musk filed the new federal case, again naming OpenAI, Altman, Greg Brockman and related entities. Contemporary coverage described the refiling.
- Spring 2026: The case proceeded to a jury trial after surviving pretrial challenges.
- May 18, 2026: The jury found against Musk because the claims were filed outside the applicable limitations period.
As of August 18, 2026, the available sources do not verify a separate, newly filed Musk-versus-OpenAI complaint on that date.
#1 Best Overall
What Musk alleged
Musk’s theory began with OpenAI’s 2015 creation as a nonprofit intended to develop artificial intelligence for humanity’s benefit. He alleged that Altman and Brockman persuaded him to help establish and fund that mission, with commitments involving safety, openness and public rather than shareholder benefit.
His federal complaint argued that OpenAI later moved toward a profit-oriented structure and that its relationship with Microsoft concentrated control and economic benefits improperly. The complaint asserted claims including breach of contract, breach of fiduciary duty, promissory estoppel, unjust enrichment, fraud-related theories and racketeering allegations. The operative filings and case documents are linked through the court docket; an earlier complaint is available at this document.
Rank #2
Musk sought remedies that could have required major changes to OpenAI’s structure and control, as well as substantial damages. OpenAI said in a January 16, 2026 filing that Musk’s damages theory ranged from approximately $65.50 billion to $109.43 billion against the OpenAI nonprofit and from $13.30 billion to $25.06 billion against Microsoft—roughly $135 billion at the high end. Those were disputed litigation estimates, not a court valuation or an award. OpenAI’s filing describes the methodology it challenged.
How OpenAI and Altman responded
OpenAI and the other defendants denied Musk’s allegations. Their principal defenses were that the claims were legally defective and untimely, and that OpenAI’s founding documents did not create the broad promises Musk attributed to them.
The Tool Desk
Outbyte Driver Updater FREEFix the driver behind crashes, sound loss and screen glitchesFind Drivers →Outbyte PC Repair FREEClear out junk files and repair common Windows errorsFree Scan →They also pointed to Musk’s earlier support for the possibility that OpenAI would need a for-profit or similar structure to raise the capital required to build advanced AI. OpenAI argued that Musk’s lawsuit was connected to his position as a commercial competitor through xAI and was intended to hinder a rival or gain leverage. That is OpenAI’s characterization, not a judicial finding. Its account appears in OpenAI’s statement and its answer, defenses and counterclaims.
Why the case reached a jury
In January 2026, the judge allowed Musk’s core claims to proceed to a jury trial rather than ending the case at the pretrial stage. The trial put the parties’ historical promises, OpenAI’s founding documents, the timing of any alleged breach and possible remedies before jurors. Coverage of that ruling reported the decision.
Jury selection began on April 27, 2026, and Musk testified on April 28–30. The court announced that audio access would begin May 4, with proceedings expected to continue to about May 21. The court’s audio announcement provides the schedule.
What the May 18 verdict decided
The jury found against Musk after concluding that his claims were untimely. That means Musk lost this lawsuit, but the verdict should not be described as a ruling that every allegation about OpenAI’s motives, safety practices, corporate restructuring or founding promises was false.
Best Value
- Legal outcome: Musk’s case failed.
- Decisive procedural issue: The claims were brought too late under the applicable limitations period.
- Not an award: Musk received none of the disputed damages figures, including the roughly $135 billion maximum described in OpenAI’s filing.
- Not a blanket governance ruling: The verdict did not resolve every broader question about nonprofit control of OpenAI’s commercial operations.
Associated Press reports on the verdict are available here and here. A Reuters-based chronology also discusses the statute-of-limitations issue: Marketscreener report.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Where xAI fits—and which cases are different
Musk launched xAI in 2023, making it a direct competitor to OpenAI in foundation models and chatbot products. OpenAI used that relationship to argue that Musk had a commercial motive to challenge it. Competition is relevant context, but it does not by itself prove why Musk filed the case. AP’s background report describes xAI’s role.
Readers may also encounter later litigation brought by xAI or other Musk-controlled entities. For example, a separate antitrust dispute concerned Apple’s relationship with OpenAI. That is not the same as Musk v. Altman: the plaintiff, legal theory and disputed conduct are different. A discussion of that distinction appears here, although Reddit is not a court record.
Key dates at a glance
| Date | Event | Why it matters |
|---|---|---|
| 2015 | OpenAI is founded with Musk, Altman, Brockman and others among the founding figures. | Creates the relationship underlying the dispute. |
| February 2024 | Musk files the initial lawsuit. | First major case in this dispute. |
| June 2024 | Musk withdraws it. | Sets up the later “again” headline. |
| August 5, 2024 | Federal case 4:24-cv-04722-YGR is filed. | The case that went to trial. |
| January 2026 | Core claims are allowed to proceed toward trial. | The case survives pretrial challenges. |
| April 27–30, 2026 | Jury selection and Musk’s testimony. | The trial phase begins. |
| May 4, 2026 | Trial audio access starts. | Public access to proceedings. |
| May 18, 2026 | Jury finds against Musk on timeliness grounds. | Disposition of the principal lawsuit. |
What remains unresolved
The verdict did not settle the policy and corporate-governance debate surrounding OpenAI’s nonprofit foundation, its commercial operating structure, Microsoft’s role or the competitive relationship between OpenAI and xAI. The sources available here also do not establish the complete post-verdict appellate status; that question requires checking the current federal docket.
Recommended Free Tools
Quick Recap
Product prices and availability are accurate as of the date/time indicated and are subject to change. Any price and availability information displayed on Amazon at the time of purchase will apply.
