The xAI and OpenAI lawsuit docket now spans three separate cases filed since early 2024, and by mid-2026 two of them are over. A federal judge dismissed xAI’s trade secrets suit against OpenAI with prejudice in June 2026. A jury rejected Elon Musk’s personal $150 billion suit in May 2026, finding he had waited too long to sue. The only case still live is the antitrust action that X Corp. and xAI brought against Apple and OpenAI in Texas, and it is stuck in a bruising discovery fight over Musk’s own emails.
The Trade Secrets Case Is Over
xAI sued OpenAI on September 24, 2025, in the U.S. District Court for the Northern District of California, accusing it of running a coordinated campaign to poach xAI engineers and pull proprietary Grok material out the door with them.1Courthouse News Service. Elon Musk’s xAI Accuses OpenAI of Stealing Trade Secrets The complaint named engineer Xuechen Li (whom xAI had already sued individually in August 2025 and blocked with a temporary restraining order), London-based inference lead Jimmy Fraiture, and an unnamed senior finance executive said to have taken data center deployment information.2Courthouse News Service. xAI v. OpenAI Complaint xAI said the material at issue included complete Grok source code, training methods, infrastructure design, and a recording of an all-hands meeting in which Musk discussed contracts and priorities. The claims ran under the federal Defend Trade Secrets Act plus state theories of interference and unfair competition.3Beck Reed Riden LLP. xAI Sues OpenAI, Expanding the Trade Secret Battle in the AI Race
OpenAI called the suit a “publicity stunt,” denied ever acquiring or using xAI’s trade secrets, and noted that Li never actually started at OpenAI because of the restraining order.4OpenAI. OAI Answer and Affirmative Defenses
Judge Rita F. Lin dismissed the amended complaint on February 24, 2026. The order identified three fatal problems: xAI described what individuals allegedly did before joining OpenAI but did not show OpenAI itself directed or induced the theft; xAI could not point to actual use of any secret (mere possession is not enough, and California has rejected the “inevitable disclosure” doctrine); and the vicarious liability theory collapsed for Li because he never worked at OpenAI. The state unfair competition claims were preempted by California’s Uniform Trade Secrets Act.5Courthouse News Service. xAI v. OpenAI Court Order
xAI filed a second amended complaint by the March 17, 2026 deadline, this time recasting routine hiring interviews as inducement to steal secrets. Judge Lin rejected the theory, writing that it would “potentially expose employers to liability any time they inquire about a candidate’s past work.”6Bloomberg Tax. OpenAI Again Defeats xAI Trade Secrets Suit Over Code, Ex-Staff On June 15, 2026, she dismissed the case with prejudice, finding further amendment would be “futile.”7Al Jazeera. US Judge Dismisses Musk’s xAI Trade Secret Lawsuit Against OpenAI xAI cannot refile.8Engadget. xAI Lawsuit Accusing OpenAI of Stealing Trade Secrets Has Been Thrown Out
The Antitrust Case Against Apple and OpenAI Is Still Alive
A month before the trade secrets filing, on August 25, 2025, X Corp. and xAI sued Apple and OpenAI in the U.S. District Court for the Northern District of Texas. The claim: the two companies conspired to lock up both the smartphone and generative AI chatbot markets.9CNBC. Musk Lawsuit Apple OpenAI Monopoly
The centerpiece is the June 2024 deal that made ChatGPT the only generative AI chatbot natively integrated into iOS, embedded in Siri, Apple’s Writing Tools, and the iPhone camera. The complaint says Apple rejected integration deals with Google and Anthropic, that Siri requests cannot be routed to any alternative chatbot, and that the exclusive arrangement funnels prompts from hundreds of millions of iPhones to OpenAI, starving Grok and other rivals of the training data they need. It alleges Apple holds 65% of the smartphone market and OpenAI at least 80% of the chatbot market.10Ars Technica. X Corp. v. Apple Complaint The plaintiffs added an App Store theory as well, saying Apple deprioritizes and slow-walks review of competing apps and pointing out that as of August 24, 2025, ChatGPT was the only generative AI chatbot in the App Store’s “Must-Have Apps” section even though Grok ranked second in Productivity and X ranked first in News.
Both defendants moved to dismiss. OpenAI attacked xAI’s math, saying the estimated pool of training prompts from the integration was a “fraction of a fraction” of what xAI claimed, because integration works only on newer iPhones where users must opt in and link accounts. Apple argued xAI has no antitrust standing (it is neither a consumer nor a smartphone competitor), called the theory “speculation on top of speculation,” and said it plans to expand to other AI providers, a point backed by Google CEO Sundar Pichai’s testimony.11Ars Technica. OpenAI Mocks Musk’s Math in Suit Over iPhone ChatGPT Integration
The case has moved into discovery, and discovery has become the story. In February 2026, OpenAI filed a motion to compel, alleging that xAI executives, Musk included, had used ephemeral messaging tools such as Signal and XChat to destroy relevant evidence, that plaintiffs had produced “virtually nothing,” and that sanctions, a forensic inspector, and a special master were warranted.12OpenAI. Court Filing – Brief in Support of Motion to Compel U.S. Magistrate Judge Hal R. Ray, Jr. ruled Musk’s Tesla and SpaceX email accounts fell within discovery because there was reason to believe he uses them for xAI and X business. When X and xAI objected, U.S. District Judge Mark Pittman overruled the objection on June 2, 2026, and ordered production.139to5Mac. Court Orders Elon Musk to Turn Over Tesla and SpaceX Emails in Apple OpenAI Lawsuit No specific production deadline had been set as of that ruling, and the wider discovery disputes were unresolved.14PYMNTS. Musk Emails Take Center Stage in X’s Antitrust Suit With OpenAI and Apple
Musk’s Personal Suit Over OpenAI’s Nonprofit Mission Was Rejected by a Jury
The oldest of the three cases is Musk’s own. He sued OpenAI, Sam Altman, and Greg Brockman on February 29, 2024, in San Francisco Superior Court, alleging breach of contract, promissory estoppel, and breach of fiduciary duty. The theory: the founders agreed in 2015 to build a nonprofit whose technology would be open-source and developed for humanity, and OpenAI abandoned that mission by keeping GPT-4’s design secret and operating as a “de facto closed-source subsidiary” of Microsoft. Musk said he had contributed over $44 million to OpenAI between 2016 and September 2020.15Courthouse News Service. Musk v. Altman – OpenAI Complaint
OpenAI responded by publishing 2017 communications in which, it said, Musk had supported a for-profit transition, directed his wealth manager to create a public benefit corporation, and demanded majority equity, absolute control, and the CEO title before resigning as co-chair in February 2018 when leadership refused.16OpenAI. Elon Musk Wanted an OpenAI For-Profit
The case grew into a broader challenge to OpenAI’s corporate restructuring. Musk sought to remove Altman, unwind OpenAI’s for-profit entity, and force “disgorgement” of up to $150 billion into the OpenAI nonprofit foundation, split as $109 billion attributed to OpenAI and $25 billion attributed to Microsoft in calculations by economist C. Paul Wazzan. Judge Yvonne Gonzalez Rogers said before trial that the expert appeared to be “pulling numbers out of the air” and added, “Do I find it convincing? Not really.” She let the testimony reach the jury anyway.17Times of India. Judge Doubts Elon Musk’s Damages Claim Against OpenAI
The jury never got to the merits. On May 18, 2026, after less than two hours of deliberation, a nine-member jury in U.S. District Court in Oakland unanimously found that Musk filed too late. The applicable windows required him to show he was unaware of the alleged breach of charitable trust before August 5, 2021 (three-year limit) and unaware of the unjust enrichment before August 5, 2022 (two-year limit). He could not meet those thresholds. Judge Gonzalez Rogers dismissed all claims following the verdict.18NPR. Musk Altman OpenAI Jury Verdict Claims Dismissed Separate antitrust claims against OpenAI and Microsoft that were part of the same case remained technically unresolved at the time of the verdict, but the judge indicated they were unlikely to reach a second trial phase.19The New York Times. OpenAI Trial Verdict Altman Musk Musk’s attorneys Steven Molo and Marc Toberoff said they will appeal to the Ninth Circuit.
What About OpenAI’s Restructuring
OpenAI’s shift to a for-profit structure is often folded into stories about the lawsuits, but the two tracks resolved separately. OpenAI completed its restructuring in October 2025, reorganizing into a nonprofit OpenAI Foundation that holds a controlling equity stake in a public benefit corporation called OpenAI Group PBC.20CNBC. OpenAI For-Profit Microsoft The California and Delaware attorneys general, who had been urged by figures including Geoffrey Hinton and Lawrence Lessig to block it,21Time. OpenAI For-Profit Letter Elon Musk instead reached a November 2025 agreement to serve as ongoing watchdogs: quarterly monitoring, an independent auditor, two independent additions to the Safety and Security Committee including a safety expert, and retained authority to sue if safety and security interests are not met.22Delaware Public Media. Delaware and California AGs to Act as OpenAI’s Watchdogs as Company Restructures Those oversight mechanisms sit outside the Musk and xAI cases.