Published by Paul Ethan · Title 26 Labs, Inc.
Musk v. Altman
Two of the founders of OpenAI are now in federal court fighting over what the company was supposed to be — and what it's allowed to become.
Oakland, California · Opening arguments April 28, 2026 · Judge Yvonne Gonzalez Rogers presiding
A decade after Elon Musk and Sam Altman helped found OpenAI as a nonprofit research lab, the two men faced each other across a federal courtroom in Oakland. Musk alleges that Altman and OpenAI president Greg Brockman betrayed the lab's founding charitable mission by spinning its core technology into a for-profit business. OpenAI says Musk's lawsuit is a baseless attempt to hobble a competitor he failed to control.
The Case at a Glance
How We Got Here
Musk, Altman, Brockman and others co-found OpenAI as a nonprofit dedicated to developing AI "to benefit humanity." Musk becomes the largest individual donor, contributing roughly $44 million.
After internal disputes over leadership and direction, Musk leaves OpenAI's board. The company cites potential conflicts with Tesla's own AI work.
OpenAI creates a for-profit subsidiary that operates under the nonprofit parent, intended to attract investment for compute and chips required to build cutting-edge AI.
ChatGPT launches and goes viral. OpenAI's valuation climbs into the hundreds of billions, and Microsoft becomes a major commercial partner.
Musk founds xAI as a competitor to OpenAI.
Musk sues OpenAI, Altman and Brockman, alleging they reneged on commitments to keep the lab nonprofit. The case is later refiled in federal court in Oakland.
OpenAI restructures, cementing its form as a public benefit corporation under the nonprofit parent. Musk asks the court to unwind the conversion.
Jury selection. Nine jurors are seated in an advisory capacity. Altman and Brockman appear in person; Musk does not attend but posts attacks on X.
Opening arguments begin in Oakland. Musk's lead trial lawyer Steven Molo opens: "Without Elon Musk, there would be no OpenAI, pure and simple."
The Two Sides
Musk's Claims
Musk alleges he was "manipulated" and "deceived" into bankrolling OpenAI on the explicit understanding that any artificial general intelligence developed there would be open and shared with the world. His complaint covers breach of charitable trust and unjust enrichment. He has asked the court to remove Altman and Brockman from their roles, unwind the for-profit conversion, and direct any damages to OpenAI's nonprofit arm rather than to him personally.
OpenAI's Defense
OpenAI calls the lawsuit "baseless" and characterizes it as "a jealous bid to derail a competitor" — pointing to Musk's launch of xAI in 2023. The company argues Musk knew early on that significant outside investment would be necessary, and was part of internal discussions about creating a for-profit arm. OpenAI notes that its nonprofit still exists and retains the upside from the for-profit subsidiary; nonprofits are permitted to earn profits, only not distribute them to shareholders.
The Legal Question Underneath
Beyond the personal feud, the case turns on a genuinely unsettled question of nonprofit law: when a donor gives money to a charity, what rights does that donor retain over how the charity later evolves? Musk's theory frames the case as a breach of charitable trust. Some legal scholars are skeptical that the framing maps cleanly onto how nonprofit law actually works, noting that OpenAI's nonprofit parent still exists and still controls the for-profit subsidiary. California's attorney general — who would normally be the party with clearest standing to enforce a charitable trust — has declined to join Musk's suit, saying the office did not see how the action serves the public interest.
Who's Expected to Testify
Elon Musk
Plaintiff. His testimony about what he was promised in 2015 is central to the case.
Sam Altman
Defendant; OpenAI CEO.
Greg Brockman
Defendant; OpenAI President.
Satya Nadella
Microsoft CEO; relevant to OpenAI's commercial partnerships.
Ilya Sutskever
Former OpenAI Chief Scientist and co-founder.
Mira Murati
Former OpenAI CTO.
What a Ruling Could Change
If Musk Prevails
If Musk prevails, the most far-reaching remedies would force OpenAI to unwind its for-profit structure and remove its current leadership. Even short of that, an adverse ruling would cloud OpenAI's path to a public offering — an IPO previously rumored for 2027 could slip to 2028 or later.
If OpenAI Prevails
If OpenAI prevails, the company is positioned to continue its current trajectory: a roughly $500 billion–to–$1 trillion-valued enterprise, with a public benefit corporation operating under a nonprofit parent, and a path toward a stock listing.
About muskvaltman.ai
muskvaltman.ai is published by Paul Ethan, CEO of Title 26 Labs, Inc. The site is a neutral, sourced guide to the federal litigation — no fabricated quotes, no live updates, just contemporaneous reporting from major outlets. It is independent and not affiliated with OpenAI, xAI, Tesla, SpaceX, or any party to the litigation.
Visit muskvaltman.aiThis page is compiled from contemporaneous reporting by major outlets. Specific figures, dates, and quotations are drawn from CNBC, NPR, MIT Technology Review, ABC7 San Francisco, NBC News, and CBC News.