Sam Altman took the witness stand on Tuesday to defend OpenAI against Elon Musk's claim that the company abandoned its nonprofit mission to enrich executives. The high-stakes trial, now in its third week, pits two of tech's biggest personalities against each other in a legal clash that could fundamentally reshape one of the world's leading artificial intelligence companies.

What Is Elon Musk Actually Accusing Sam Altman Of?

Musk's legal team argues that OpenAI, Altman, and OpenAI president Greg Brockman, with help from Microsoft investments, abandoned the company's founding mission of creating advanced artificial general intelligence (AGI), a term referring to AI systems that can perform any intellectual task a human can. Instead, Musk contends they enriched themselves by creating a for-profit subsidiary that now effectively controls the nonprofit entity.

The core of Musk's complaint centers on two civil claims: "breach of charitable trust" and "unjust enrichment." If the United States District Court for the Northern District of California finds Altman, Brockman, and Microsoft liable, Musk is asking them to return up to $150 billion to the nonprofit entity. He is also seeking to unwind the for-profit structure entirely and have Altman and Brockman removed from their leadership roles.

How Did OpenAI's Nonprofit-to-For-Profit Transition Happen?

The dispute traces back nearly a decade to when OpenAI's founders, including Musk, decided they needed to create a for-profit entity to attract top talent and raise the massive capital required to develop competitive AI technology. Musk, who donated $38 million to OpenAI early on, wanted control of the for-profit subsidiary; the other founders opposed giving any single person that level of control.

On the stand, Altman testified that the co-founders felt no single person should control AGI, and that Musk was not a good fit for the company. Musk left the board in 2018, and Altman characterized his departure as a morale boost for employees who did not appreciate his "hardcore" approach.

• Musk's Original Role: Musk was a co-founder and donated $38 million to OpenAI in its early years, expecting control of the for-profit entity.
• The Founders' Disagreement: Other co-founders opposed giving any single person control over AGI development, leading to conflict over governance structure.
• Musk's Exit: Musk left the board in 2018, which Altman said improved company morale among employees who found his management style challenging.
• The For-Profit Structure: OpenAI's nonprofit still exists and technically owns the for-profit entity, now valued in the hundreds of billions of dollars, but Musk argues it has been sidelined.

What Evidence Is Each Side Presenting in Court?

OpenAI's legal team has argued that Musk is motivated by "sour grapes" and is attempting to damage a competitor. On the stand, Altman pushed back forcefully against the notion that Musk genuinely cares about OpenAI's mission. "Mr. Musk did try to kill it," Altman stated, adding that Musk launched a competitor called xAI, attempted to poach OpenAI talent, and engaged in what he characterized as "business interference".

OpenAI's lawyers have drawn on once-private text messages and emails to paint Musk as power-hungry and initially supportive of plans for the for-profit to attract massive investments. The OpenAI legal team also attempted to undermine Musk's credibility by highlighting messages that appeared to show he tried to recruit talent from OpenAI before leaving the board, and was kept informed of company decisions afterward by then-board member Shivon Zilis, who is the mother of four of Musk's children.

Musk's lawyers, meanwhile, have tried to establish that Altman and Brockman were intent on reaping personal profits from OpenAI despite its original nonprofit mission. During cross-examination, Musk's attorney Steven Molo questioned Altman's credibility directly. When asked if he was trustworthy, Altman replied, "I believe so." When pressed on whether he always told the truth, Altman acknowledged, "I'm sure there are some times in my life when I did not." Asked if he had been called a liar by business associates, Altman said, "I have heard people say that".

Altman

Why Does This Trial Matter for the Future of AI?

The trial has opened a rare window into the internal machinations of some of Silicon Valley's most ambitious tech entrepreneurs as they debated the future of AI and wrestled over investment plans and control of OpenAI. The company went on to become a global leader in artificial intelligence following the launch of ChatGPT in 2022.

If the court rules against OpenAI and its executives, the consequences could be dramatic. Unwinding the for-profit structure and removing Altman and Brockman from leadership could radically reshape OpenAI and potentially undercut its AI development efforts at a critical moment in the technology's evolution. The decision could also set a precedent for how courts view the governance of nonprofit-to-for-profit transitions in the tech industry.

Closing arguments are scheduled for Thursday, with a decision from an advisory jury and Judge Yvonne Gonzalez Rogers possible as early as next week.