Elon Musk is pursuing a $150 billion lawsuit against OpenAI and its CEO Sam Altman, alleging they betrayed the company's original nonprofit mission by pivoting to a for-profit model in 2019. The high-stakes trial unfolding in Oakland, California, exposes a fundamental clash between two of tech's most powerful figures over who should control the future of artificial intelligence.

On May 12, 2026, Altman took the witness stand to defend himself against Musk's accusations that he "stole a charity." Rather than accepting blame, Altman reframed the narrative, portraying Musk as a competitor obsessed with controlling OpenAI rather than advancing its mission.

What Exactly Is Musk Accusing Altman Of?

Musk's lawsuit centers on a specific grievance: he claims Altman persuaded him to invest $38 billion based on OpenAI's stated goal of improving humanity, only to watch the company transform into a profit-driven enterprise. Musk argues this represents a fundamental betrayal of the company's founding principles.

During his testimony, Altman rejected this characterization entirely. "It does not fit with my conception of the words 'stealing a charity' to look at what has actually happened here," Altman told the jury. He argued that Musk knew about the planned transition to a for-profit structure when he made his investment, and he presented evidence that Musk himself had pushed for significant control over the company.

According to Altman's testimony, Musk's equity demands were substantial and unwavering. "An early number that Mr Musk threw out was that he should have 90 percent of the equity to start," Altman explained to the court. "It then softened, but it always was a majority". This revelation suggests Musk's current lawsuit may be driven partly by frustration over losing control of the AI company he helped found.

How Does This Trial Affect the Future of AI Development?

The outcome of this case carries enormous implications for the AI industry and the broader tech landscape. If Musk prevails, he is seeking the removal of both Altman and OpenAI president Greg Brockman from their leadership positions. The trial also comes at a critical moment for OpenAI, which is preparing for a potential initial public offering (IPO) that could value the company at $1 trillion, one of the largest valuations in corporate history.

The dispute reflects deeper disagreements about how artificial intelligence should be developed and governed. Musk, who left OpenAI's board in 2018 to pursue his own AI ventures, now runs Grok, an AI chatbot that has faced criticism for perpetuating right-wing conspiracy theories and offensive materials. This contrast highlights how the two figures have taken fundamentally different approaches to AI development.

During his own testimony, Musk portrayed Altman as untrustworthy and potentially dangerous. "If you have someone who is not trustworthy in charge of AI, I think that's a very big danger for the whole world," Musk declared. Altman countered by questioning Musk's leadership abilities, stating: "I don't think Mr Musk understood how to run a good research lab. He had demotivated some of our most key researchers".

Key Factors Shaping the Trial's Significance

• Financial Stakes: Musk is seeking $150 billion in damages from OpenAI and Microsoft, one of OpenAI's principal investors, making this one of the largest AI-related lawsuits in history.
• Leadership Control: The trial could result in the removal of Altman and Brockman from their positions, fundamentally reshaping OpenAI's leadership and strategic direction.
• IPO Implications: OpenAI's planned $1 trillion valuation IPO could be jeopardized or delayed depending on the trial's outcome, affecting investor confidence in the company.
• Philosophical Divide: The case represents a clash between different visions for AI development, with Musk favoring his own approach through Grok and Altman defending OpenAI's current trajectory.

The trial has already extended beyond two weeks, with both sides presenting competing narratives about OpenAI's founding mission and the legitimacy of its transformation. Musk's lawyer, Steven Molo, attempted to undermine Altman's credibility by questioning whether he had misled people in business dealings. Altman's defense team, meanwhile, focused on demonstrating that Musk was aware of and even encouraged the shift toward profitability.

Public sentiment about AI development remains skeptical. A March 2026 poll by the Pew Research Center found that a majority of Americans believe AI will worsen, rather than improve, the ability to think creatively, form meaningful relationships, make difficult decisions, and solve problems. Just 10 percent of respondents said they were more excited than concerned about increased AI use in daily life.

Despite public concerns, the AI industry has translated its substantial economic power into political influence as lawmakers consider how to regulate the technology. The Trump administration has proposed a "national policy framework" for AI to avoid a patchwork of state regulations, and AI has emerged as an election-season issue ahead of the November midterms. The United Nations estimates that the global AI market could be worth $4.8 trillion by 2033, underscoring the enormous stakes involved in how the technology is developed and governed.

As the trial continues, the outcome will likely influence not just OpenAI's future, but also how the broader AI industry approaches questions of governance, control, and accountability. Whether Musk's lawsuit succeeds or fails, it has already exposed the fragility of early partnerships in the AI space and the intense competition for dominance in one of technology's most consequential fields.