Elon Musk sues Sam Altman and OpenAI over alleged breach of nonprofit mission
Consensus Summary
Elon Musk’s lawsuit against Sam Altman, Greg Brockman, OpenAI, and Microsoft centers on allegations that OpenAI betrayed its original nonprofit mission by restructuring as a for-profit entity in 2019. Musk, who provided $38 million in seed funding and co-founded OpenAI in 2015, claims he was deceived about the company’s plans and seeks over $134 billion in damages, removal of Altman and Brockman from leadership, and reversal of the for-profit restructuring. The trial, set to begin jury selection on April 29, 2026, in Oakland, California, will feature testimony from key figures including Musk, Altman, Microsoft CEO Satya Nadella, and former OpenAI board member Shivon Zilis. OpenAI counters that Musk agreed to the for-profit restructuring in 2017 and accuses him of jealousy and regret over leaving the company. The case also highlights internal tensions, including Musk’s failed bid to become CEO and Altman’s rise as the public face of the AI boom following the launch of ChatGPT in late 2022. Both sides are expected to present internal communications, including emails and diary entries, to support their claims, with the outcome potentially impacting OpenAI’s planned $1 trillion IPO and Musk’s own AI ventures.
✓ Verified by 2+ sources
Key details reported by multiple sources:
- Elon Musk filed a lawsuit against Sam Altman, Greg Brockman, OpenAI, and Microsoft in 2024 over alleged breach of contract and unjust enrichment regarding OpenAI’s restructuring as a for-profit entity.
- Jury selection for the trial begins on Monday, April 29, 2026, at a federal courthouse in Oakland, California, with opening arguments expected later in the week.
- Elon Musk provided approximately $38 million in funding to OpenAI between 2016 and 2020, mostly before leaving the board in 2018.
- OpenAI was founded in 2015 as a nonprofit with the mission to advance AI for humanity’s benefit, but restructured into a for-profit entity in 2019 (with a nonprofit oversight structure) and later as a public benefit corporation in 2025.
- Musk is seeking damages exceeding $134 billion (Guardian) and $150 billion (ABC), removal of Altman and Brockman from leadership, and reversal of OpenAI’s for-profit restructuring.
- OpenAI is expected to go public later in 2026 with a valuation of around $1 trillion.
- Microsoft is a major partner and investor in OpenAI, but denies colluding with OpenAI to exclude Musk.
- Sam Altman approached Elon Musk in May 2015 to co-found OpenAI, describing it as the 'Manhattan Project for AI'.
- Musk left OpenAI’s board in 2018 after clashing with Altman and Brockman over control and funding.
- ChatGPT was launched by OpenAI in late 2022, becoming a major driver of the AI boom.
Points of Difference
Details reported by only one source:
- Musk’s complaint opens with the line 'Elon Musk’s case against Sam Altman and OpenAI is a textbook tale of altruism versus greed' and accuses Altman of 'preying on Musk’s humanitarian concern'.
- OpenAI’s internal communications include emails, texts, and diary entries from Greg Brockman, such as 'This is the only chance we have to get out from Elon' (2017).
- Musk’s lawyers sought to exclude testimony about his attendance at Burning Man and use of 'rhino ket' (ketamine cocktail) as 'inflammatory and irrelevant'.
- OpenAI’s lawyers argue that Musk’s funding was a tax-deductible donation, not an investment, and thus does not entitle him to ownership.
- Musk called Altman a 'liar', 'swindler', and 'Scam Altman' on social media, while Altman mocked Musk’s Tesla purchase cancellation and 'ambien tweeting'.
- OpenAI maintains a dedicated webpage titled 'The truth about Elon Musk and OpenAI', calling the lawsuit a 'smear' and 'harassment' campaign.
- Musk’s lawyers calculated damages by attributing 50–75% of OpenAI’s nonprofit stake to his $38 million contributions.
- Greg Brockman’s diary entry from 2017 included the question: 'Financially, what will take me to $1B? Accepting Elon's terms nukes two things: our ability to choose and the economics.'
- Musk’s email in January 2018 stated: 'OpenAI is on a path of certain failure relative to Google.'
- Shivon Zilis, a former OpenAI board member and mother to four of Musk’s children, is a key witness, with OpenAI lawyers arguing she funneled information to Musk.
- OpenAI’s current structure includes a 26% stake held by the nonprofit, with additional warrants tied to valuation targets.
Contradictions
Conflicting information between sources:
- The Guardian states Musk is seeking $134 billion in damages, while ABC reports he is seeking $150 billion (with ABC citing a source involved in the case).
- Guardian says Musk’s funding was $38 million, while ABC confirms the same amount but notes it was mostly before 2020, with no contradiction in the total.
- Guardian claims the trial is expected to last two to three weeks, while ABC does not specify a duration but focuses on the timing of jury selection and opening statements.
- Guardian mentions Musk’s lawsuit was filed in 2024, while ABC does not specify a filing date but confirms the lawsuit’s existence and timeline leading to the 2026 trial.
- Guardian describes Musk’s damages as redistributed to OpenAI’s nonprofit arm, while ABC states proceeds would go to the nonprofit but does not specify redistribution.
Source Articles
Elon Musk and Sam Altman face off in court over OpenAI’s founding mission
Musk’s lawsuit accuses Altman of fraud, while OpenAI says that Musk is ‘motivated by jealousy’ A lawsuit between two of Silicon Valley’s biggest tycoons goes to trial Monday in California, the culmination of a years-long bitter feud. Elon Musk has accused Sam Altman of betraying the founding agreement of the non-profit they started together, OpenAI, by changing it to a for-profit enterprise. Musk accuses Altman, OpenAI , its president Greg Brockman, and its major partner Microsoft of breach of c
Musk and Altman’s bitter feud over OpenAI to be laid bare in court
Tesla chief believes Altman broke company’s founding agreement – and legal battle promises to be explosive The bitter rivalry between two of the tech world’s most powerful men arrives in court this week, as Elon Musk’s lawsuit against Sam Altman and OpenAI heads to trial in Oakland, California. The case is set to feature some of the biggest names in Silicon Valley, and its outcome could affect the course of the AI boom. Musk’s suit, filed in 2024, focuses on the formative years of OpenAI when he
Court battle between Musk and Altman to reveal power struggle at Open AI
The world's richest man is accusing the company and its chief executive Sam Altman, and Microsoft of betraying the AI start up's original mission.