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| '''Musk v. OpenAI''' — the landmark lawsuit in which Elon Musk alleges that OpenAI cofounders Sam Altman and Greg Brockman breached a charitable trust by abandoning OpenAI's nonprofit mission — begins on April 27, 2026, with advisory jury selection for a bench trial, in federal court in Oakland, California, before Judge Yvonne Gonzalez Rogers. Musk dropped his fraud claims on April 24–25, 2026, narrowing the case from 26 claims to two: breach of charitable trust and unjust enrichment.<ref name="chatgptiseatingtheworld">[https://chatgptiseatingtheworld.com/2026/01/17/the-trial-of-the-century-elon-musk-v-sam-altman-starts-monday-april-27-2026-at-800-a-m-with-jury-selection-and-breakfast/ ChatGPT is Eating the World, "The Trial of the Century: Elon Musk v. Sam Altman Starts Monday, April 27, 2026," January 17, 2026]</ref><ref name="businessinsider">[https://www.businessinsider.com/elon-musk-vs-openai-sam-altman-legal-battle-stakes-microsoft-2026-4 Business Insider, "Elon Musk vs. Sam Altman: The stakes for OpenAI and Microsoft as the lawsuit goes to trial," April 2026]</ref><ref name="musk-drops-fraud">[https://fortune.com/2026/04/25/elon-musk-fraud-claims-openai-sam-altman-trial/ Fortune, "Elon Musk drops fraud claims against OpenAI ahead of trial," April 25, 2026]</ref><ref name="cybernews-drops">[https://cybernews.com/ai-news/musk-drops-fraud-claims-in-openai-lawsuit-two-claims-head-to-trial/ Cybernews, "Musk drops fraud claims in OpenAI lawsuit, two claims head to trial," April 25, 2026]</ref><ref name="abs-cbn">[https://www.abs-cbn.com/news/technology/2026/4/25/billionaire-elon-musk-enters-courtroom-showdown-with-openai-1203 ABS-CBN, "Billionaire Elon Musk enters courtroom showdown with OpenAI," April 25, 2026]</ref>
| | #REDIRECT [[News-April-20-2026]] |
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| == Background ==
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| Musk, who co-founded OpenAI in 2015 and resigned in 2018, filed the lawsuit on August 5, 2024 ('''Case No. 4:24-cv-04722-YGR''') in the United States District Court for the Northern District of California.<ref name="justia">[https://dockets.justia.com/docket/california/candce/4:2024cv04722/433688 Justia: Musk v. Altman et al Docket]</ref> He alleges that Altman and Brockman deceived him into donating approximately $38–45 million by promising OpenAI would remain a nonprofit dedicated to advancing AI for humanity's benefit, rather than pivoting to a for-profit structure valued at over $800 billion.<ref name="businessinsider" />
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| Musk seeks to force OpenAI back to nonprofit status, remove Altman and Brockman from leadership and strip their equity, and recover billions in "ill-gotten gains" — up to $134 billion according to a January 2026 expert damage analysis by Dr. C. Paul Wazzan.<ref name="businessinsider" /><ref name="chatgptiseatingtheworld" />
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| == April 2026 Pre-Trial Developments ==
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| On '''April 24–25, 2026''', Musk voluntarily dismissed his fraud and constructive fraud claims against OpenAI, Sam Altman, and Greg Brockman, at his own request. Judge Gonzalez Rogers approved the dismissal, narrowing the case from 26 claims to just two remaining claims: '''breach of charitable trust''' and '''unjust enrichment'''.<ref name="musk-drops-fraud" /><ref name="cybernews-drops" /><ref name="straitstimes">[https://www.straitstimes.com/world/united-states/us-judge-dismisses-musks-fraud-claims-in-openai-case-at-his-request-plans-to-proceed-to-trial The Straits Times, "US judge dismisses Musk's fraud claims in OpenAI case at his request, plans to proceed to trial," April 25, 2026]</ref>
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| Musk's legal team stated the dismissal was intended to "streamline" the case and keep jurors focused on the core charitable trust theory rather than being distracted by fraud allegations.<ref name="musk-drops-fraud" />
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| == Trial Structure ==
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| The trial is divided into two phases:<ref name="chatgptiseatingtheworld" /><ref name="businessinsider" /><ref name="bloomberg-jury">[https://news.bgov.com/business-and-practice/musk-v-altman-case-will-test-jury-process-for-rich-and-famous Bloomberg Government, "Musk v. Altman Case Will Test Jury Process for Rich and Famous," April 2026]</ref>
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| * '''Phase 1 (Advisory Jury Verdict)''': Beginning '''April 27, 2026''', the jury will hear arguments and testimony on the two remaining claims (breach of charitable trust and unjust enrichment) and issue an "advisory verdict" that is non-binding on the judge. Opening statements are expected April 28, 2026. Approximately 100 potential jurors from seven Bay Area counties, including Silicon Valley, were summoned. Voir dire allows unlimited "for cause" challenges for overt bias and four peremptory challenges per side.<ref name="bloomberg-jury" /><ref name="abs-cbn" />
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| * '''Phase 2 (Remedies)''': Judge Gonzalez Rogers will hear arguments on remedies and issue a final ruling, starting approximately May 18, 2026. The judge has expressed reservations about her authority to order some of Musk's requested structural remedies, such as unwinding the for-profit conversion.
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| Trial schedule: Monday–Friday, 8:30 a.m. to 1:40 p.m. PT, with two 20-minute breaks.<ref name="chatgptiseatingtheworld" />
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| == Key Evidence and Witnesses ==
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| The trial is expected to feature dramatic testimony and evidence, including:<ref name="businessinsider" />
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| * '''Greg Brockman's private diary entries''', including a notation reading "can't see us turning this into a for-profit without a very nasty fight" and notes calling it "morally bankrupt" to "steal" the company from Musk, suggesting cofounders were not honest about their for-profit intentions.<ref name="businessinsider" />
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| * '''Communications and text messages''' involving figures like Mark Zuckerberg and Shivon Zilis (Musk's partner and Neuralink executive).<ref name="chatgptiseatingtheworld" />
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| * '''Testimony from former OpenAI board members''', including Tasha McCauley, who voted to fire Altman in November 2023, about what Musk's legal team calls a "toxic culture of lying" at OpenAI.<ref name="businessinsider" />
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| * '''Expert witness testimony from Dr. C. Paul Wazzan''' (damages expert), who calculated potential damages up to $134 billion — up to $109 billion from OpenAI and up to $25 billion from Microsoft — though this does not include punitive damages.<ref name="chatgptiseatingtheworld" /><ref name="localnews">[https://localnewsmatters.org/2026/04/23/musk-v-altman-trial-date-looms-as-judge-hands-wins-and-setbacks-to-both-sides/ Local News Matters, "Musk v. Altman trial date looms as judge hands wins and setbacks to both sides," April 23, 2026]</ref>
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| * '''Dr. Stuart Russell''', UC Berkeley professor and AI safety authority, will testify that AI companies have strong incentives to pursue AGI despite safety risks, supporting Musk's argument about OpenAI's dangerous misalignment.<ref name="localnews" />
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| * A comprehensive pre-trial dossier of court filings was published on April 23, 2026, including evidence such as Brockman's diary entries and text messages involving Mark Zuckerberg and Shivon Zilis.<ref name="ai-corner">[https://www.the-ai-corner.com/p/musk-altman-openai-trial-dossier-court-filings-2026 The AI Corner, "Musk v. Altman: The Trial Dossier — Key Court Filings," April 23, 2026]</ref>
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| * '''Potential testimony from Microsoft CEO Satya Nadella''' regarding Microsoft's $1 billion investment and partnership.<ref name="businessinsider" />
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| == OpenAI's Defense ==
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| OpenAI counters that Musk's lawsuit is a "harassment campaign" driven by "ego, jealousy and a desire to slow down a competitor," framing him as a disgruntled rival seeking to harm OpenAI through his competing xAI company.<ref name="businessinsider" /> OpenAI has filed counterclaims alleging Musk's anti-competitive behavior, and has urged California and Delaware attorneys general to investigate.<ref name="businessinsider" />
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| == Significance ==
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| The case represents one of the most consequential legal battles in AI industry history. A Musk victory could force OpenAI to abandon its for-profit structure and potentially unravel its partnership with Microsoft, reshaping the governance of one of the world's most valuable AI companies. An OpenAI victory would validate its for-profit transition but may still expose internal governance concerns through the public trial evidence.<ref name="businessinsider" /><ref name="chatgptiseatingtheworld" />
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| The trial also has broader implications for AI industry governance, nonprofit-to-for-profit conversions, and the legal responsibilities of AI company founders to donors and the public interest.
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| == See Also ==
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| * [[Musk v Altman et al]] — Full case page
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| * [[Cases]] — Active AI litigation tracker
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| * [[Nippon Life v OpenAI Foundation]] — OpenAI's unlicensed practice of law suit
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| * [[Doe v X.AI Corp]] — Another AI company defendant case (xAI)
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| == References ==
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| <references />
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| [[Category:Corporate Governance]]
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| [[Category:Cases Against OpenAI]]
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