Elon Musk Sues OpenAI and Microsoft for $134 Billion Over 'Wrongful Gains'

The Tesla CEO claims his early contributions to OpenAI entitle him to a share of the AI company's and Microsoft's profits.

Apr. 10, 2026 at 2:34am

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A highly detailed, 3D macro illustration of a glowing, neon-lit circuit board or data server rack, representing the complex digital infrastructure underlying AI technology. The image features recognizable physical tech elements like circuit traces, cooling fans, and metallic enclosures, all illuminated by vibrant cyan and magenta lights.The legal battle over Elon Musk's early contributions to OpenAI highlights the high-stakes conflicts shaping the future of artificial intelligence.Oakland Today

Elon Musk, the CEO of Tesla and now owner of xAI, is demanding up to $134 billion from OpenAI and Microsoft, arguing that they unfairly benefited from his early contributions to OpenAI. Musk claims he provided crucial funding, expertise, and credibility that enabled OpenAI's success, which he believes the company betrayed by restructuring as a for-profit entity. OpenAI and Microsoft are fighting back, disputing Musk's damage claims and characterizing the lawsuit as a "harassment campaign." The case is headed to trial in April, setting the stage for a high-stakes legal battle over the value of Musk's early involvement and the direction of the AI industry.

Why it matters

This case highlights the complex dynamics between tech visionaries, their early-stage startups, and the companies that later profit from those innovations. It raises questions about intellectual property rights, the responsibilities of founders, and the balance between profit motives and ethical AI development.

The details

Musk claims he contributed approximately $38 million, representing about 60% of OpenAI's initial seed funding, and played a crucial role in recruiting key personnel, connecting the founders with valuable contacts, and lending credibility to the project. He believes his contributions entitle him to a share of the $65.5 billion to $109.4 billion in benefits OpenAI has allegedly reaped, as well as the $13.3 billion to $25.1 billion in gains Microsoft has allegedly made. OpenAI and Microsoft are fighting the lawsuit, dismissing Musk's damage claims as "baseless" and "unprecedented."

  • Musk departed OpenAI in 2018.
  • The trial is expected to commence in April 2026.

The players

Elon Musk

The CEO of Tesla and owner of xAI, who is suing OpenAI and Microsoft for $134 billion over his early contributions to OpenAI.

OpenAI

An artificial intelligence research company that Musk co-founded in 2015 and later departed in 2018, which he now claims has betrayed its original non-profit, open-source mission by restructuring as a for-profit entity.

Microsoft

A technology company that Musk alleges has unfairly benefited from OpenAI's success, and is now a target of his $134 billion lawsuit.

Steven Molo

Elon Musk's lead trial lawyer, who stated that "Without Elon Musk, there'd be no OpenAI" and that Musk is entitled to the "wrongful gains" the companies have accumulated.

C. Paul Wazzan

Elon Musk's expert witness, a financial economist who has quantified the value of Musk's contributions to OpenAI.

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What’s next

A judge in Oakland, California, has already ruled that a jury will hear the case, with the trial expected to commence in April 2026. The outcome of this trial could have significant implications for the future of AI development and the rights of early contributors to technology startups.

The takeaway

This case highlights the complex and often contentious relationship between tech visionaries, their early-stage startups, and the larger corporations that later profit from those innovations. It raises important questions about intellectual property rights, the responsibilities of founders, and the balance between profit motives and ethical AI development.