Elon Musk is suing OpenAI and co-founder Sam Altman, claiming they betrayed the company's original non-profit mission by shifting toward a for-profit model. During his second day on the stand in April 2026, Musk became visibly frustrated with OpenAI's legal team, accusing them of deliberately crafting confusing questions designed to undermine his testimony.

Why Is Musk Taking OpenAI to Court?

The lawsuit, filed in 2024, centers on a fundamental disagreement about OpenAI's direction. Musk donated $38 million to OpenAI's non-profit arm and helped establish the company with the explicit goal of ensuring that artificial general intelligence (AGI), the kind of AI that could surpass human intelligence, would be developed safely and for public benefit rather than corporate profit.

In 2019, OpenAI created a commercial arm, a move Musk has criticized as a betrayal of the original mission. When ChatGPT launched in late 2022 and became wildly successful, Musk's concerns intensified. He is now asking for billions of dollars in what his lawyers call "wrongful gains" to be redirected to OpenAI's non-profit division, and he wants to see major leadership changes, including the removal of Sam Altman.

What Happened During Musk's Testimony?

Wearing a dark suit and tie, Musk took the stand with Sam Altman and OpenAI co-founder Greg Brockman watching from the front row. The tech billionaire acknowledged that he initially intended to have control over OpenAI but expected that control to shift as more investors joined the company. He emphasized that he deliberately chose to structure OpenAI as a non-profit because he was providing most of the capital and wanted to ensure the company stayed true to its mission.

When OpenAI's lawyer, William Savitt, began cross-examination, tensions escalated quickly. Musk objected to the line of questioning, telling Savitt directly: "Your questions are not simple. They're designed to trick me essentially." This combative exchange highlights the personal animosity underlying the legal dispute.

How Is OpenAI Defending Itself?

OpenAI's defense strategy rests on several key arguments that paint a very different picture of Musk's motivations. The company contends that Musk understood and even approved the decision to create a commercial arm, and that he only became litigious after failing to secure control of the company. OpenAI also argues that Musk's $38 million donation was "spent exactly as intended and in service of the mission".

More provocatively, OpenAI and its legal team suggest that Musk is motivated by jealousy and regret over walking away from the company in 2018. They argue he is now using the lawsuit to undermine a key competitor in the AI race. Savitt pointed out a critical inconsistency in Musk's position: while claiming he wanted OpenAI to remain non-profit for safety reasons, Musk launched his own AI startup, xAI, as a for-profit company in 2023, one year after ChatGPT's release.

"We're here because Mr. Musk didn't get his way at OpenAI. Because he's a competitor, Mr Musk will do anything to attack OpenAI," said William Savitt, OpenAI's lawyer.

William Savitt, Lawyer for OpenAI

What Are the Key Claims in This Case?

The legal battle involves multiple serious allegations that could reshape how AI companies structure themselves and operate. Understanding the core claims helps explain why this case matters beyond just the two billionaires involved:

• Breach of Charitable Trust: Musk alleges that OpenAI violated its fiduciary duty to its non-profit mission by prioritizing profit over public benefit and safety considerations.
• Unjust Enrichment: Musk's legal team argues that OpenAI's leadership and Microsoft, which has invested billions into the company, have unjustly benefited from the shift to a for-profit model at the expense of the charitable mission.
• Competitive Motivation: OpenAI counters that Musk is using the lawsuit to damage a competitor, pointing to his own for-profit xAI venture as evidence of hypocrisy.
• Control and Influence: Savitt suggested that Musk wanted to merge OpenAI with Tesla, his electric vehicle company, and used his investment to "bully" other founders into giving him control.

How Could This Case Impact the AI Industry?

The lawsuit is expected to last several weeks and could have far-reaching implications for how AI companies are structured and governed going forward. The case raises fundamental questions about the relationship between non-profit missions and for-profit operations in the AI space, and whether founders can be held accountable for shifting a company's core purpose.

The trial also highlights the intense competition in the AI market. Musk launched xAI, which produces the chatbot Grok, as a direct competitor to OpenAI's ChatGPT. The company has lagged behind competitors since its 2023 launch, which OpenAI's legal team suggests is the real motivation behind Musk's lawsuit. If Musk wins, it could set a precedent for how non-profit structures are protected in the tech industry.

Steps to Understanding the Legal Arguments in This Case

For those following this high-stakes trial, here are the key elements to track as the case unfolds:

• Timeline of Decisions: Pay attention to when OpenAI made the decision to create a commercial arm in 2019 and whether Musk explicitly approved it or was simply informed after the fact.
• Financial Documentation: The trial will likely focus on how Musk's $38 million donation was spent and whether it truly served the non-profit mission or was diverted to support the for-profit operations.
• Witness Testimony: Sam Altman and Greg Brockman are expected to testify, and their accounts of conversations with Musk about the company's direction will be crucial to determining credibility.
• Competitive Context: The court will need to weigh whether Musk's concerns about AGI safety are genuine or whether his launch of xAI as a for-profit company undermines his credibility on this point.

Musk framed the lawsuit's significance in stark terms during his opening statement, telling one of his lawyers: "It's actually very simple. It's not okay to steal a charity. If it's okay to loot a charity, the entire foundation of charitable giving will be destroyed." This rhetorical framing sets the stage for a trial that will ultimately determine whether a company can fundamentally change its mission after accepting donations and investments made under the original charitable premise.

The case represents more than just a dispute between two billionaires. It reflects deeper tensions in the AI industry about whether safety and public benefit can coexist with commercial success, and whether the founders and investors who helped establish AI companies have the right to hold them accountable to their original missions.