Musk vs OpenAI Trial Heats Up as Key Witnesses Testify

The high-stakes trial between Elon Musk and OpenAI has reached a dramatic turning point, with testimony from key witnesses — including Musk's own close associate — appearing to bolster OpenAI's defense rather than his attack. As the case enters its second week in federal court, video depositions from former CTO Mira Murati and live testimony from Shivon Zilis, a Neuralink executive and mother of 4 of Musk's children, have introduced unexpected complexity into Musk's legal strategy.

The trial, widely dubbed the 'AI trial of the century,' centers on Musk's claim that OpenAI CEO Sam Altman betrayed the organization's founding nonprofit mission by pivoting to a for-profit structure. But the courtroom revelations of the past several days suggest Musk's case may be on shakier ground than anticipated.

Key Takeaways From the Trial So Far

• Musk contributed approximately $38 million to OpenAI during its early years, according to testimony from Jared Birchall, head of Musk's family office
• Mira Murati's video deposition was played by Musk's legal team but contained statements that cut both ways — criticizing Altman while also defending his role
• Shivon Zilis, called as a witness for Musk's side, delivered testimony that reportedly helped OpenAI's defense
• Musk once offered Altman a seat on Tesla's board, a detail that complicates the narrative of deep-seated distrust
• Greg Brockman, OpenAI's president, and UC Berkeley professor Stuart Russell both testified during the second week
• The trial continues to draw intense media coverage, with reporters from The New York Times, The Verge, and other major outlets providing daily updates

Murati's Deposition Cuts Both Ways for Musk

Musk's legal team played Mira Murati's video deposition hoping to demonstrate that Altman had long-standing trust and management issues within OpenAI. Murati, who served as OpenAI's CTO before departing in late 2024, did provide some ammunition — she stated that Altman had lied to her regarding AI model safety review procedures and had actively undermined her ability to perform her duties.

However, the deposition was far from a clean win for Musk. Murati also offered statements that appeared to support Altman's overall leadership and OpenAI's organizational direction. This duality in her testimony highlights a recurring challenge for Musk's legal team: many of the witnesses who have grievances with Altman's management style still fundamentally support the company's trajectory.

The nuanced nature of Murati's testimony underscores a critical distinction that OpenAI's defense has hammered home throughout the trial — disagreements about management are not the same as evidence of contractual betrayal or fraud.

Zilis Testimony Reportedly Backfires on Musk

Perhaps the most surprising development came from Shivon Zilis, who was called as one of Musk's key witnesses. Zilis holds a unique position in this legal drama — she is a former OpenAI board member, a current Neuralink executive, and the mother of 4 of Musk's children. Her intimate knowledge of both OpenAI's early governance and Musk's thinking made her a potentially powerful witness.

Yet according to multiple courtroom reports, her testimony appeared to help OpenAI more than Musk. While the full details of her statements are still emerging, the outcome represents a significant setback for Musk's legal strategy. When your own witnesses bolster the opposing side's narrative, it raises serious questions about the strength of the underlying case.

The Zilis situation also highlights an uncomfortable reality for Musk — many of the people closest to him during OpenAI's founding years have complex, layered perspectives that don't neatly align with his legal arguments.

The $38 Million Question and Tesla Board Offer

Jared Birchall, CEO of Neuralink and head of Musk's family office, provided testimony confirming that Musk contributed a cumulative total of approximately $38 million to OpenAI. This figure, roughly equivalent to 260 million Chinese yuan, represents a substantial investment but falls well short of the billions that OpenAI has since raised from Microsoft and other investors.

Musk's legal team has used this financial contribution as evidence of his deep commitment to OpenAI's original nonprofit mission. The argument is straightforward: Musk invested tens of millions based on specific promises about how the organization would operate, and those promises were broken.

But a complicating detail has emerged — Musk reportedly once offered Altman a seat on Tesla's board of directors. This revelation undermines the narrative that Musk always viewed Altman with suspicion or that their relationship was purely adversarial. If Musk trusted Altman enough to consider giving him governance authority over his most valuable company, it becomes harder to argue that Altman was engaged in a long-running deception.

• Musk's $38 million contribution represents a small fraction of OpenAI's total funding
• The Tesla board offer suggests a much warmer relationship than Musk's lawsuit implies
• Birchall's testimony confirmed the financial details but didn't establish fraudulent intent by Altman
• The funding timeline shows Musk was an early but not ongoing financial supporter

Expert Testimony and the AI Safety Angle

Stuart Russell, a renowned AI safety researcher and professor at UC Berkeley, testified as an expert witness for Musk's side. Russell is one of the most respected voices in the AI safety community and co-author of the widely-used textbook 'Artificial Intelligence: A Modern Approach.'

His testimony focused on the importance of OpenAI's original nonprofit safety-first mission and the risks associated with developing advanced AI systems under a for-profit structure. This line of argument resonates with a growing chorus of AI researchers who have expressed concern about the commercialization of frontier AI development.

However, expert testimony about AI safety philosophy is different from proving specific legal claims about breach of contract or fiduciary duty. The court must ultimately decide narrow legal questions, not broad policy debates about how AI should be developed.

Industry Context: Why This Trial Matters Beyond the Courtroom

This trial has implications far beyond the personal rivalry between Musk and Altman. It touches on fundamental questions about the structure of AI development organizations and whether nonprofit missions can survive the gravitational pull of massive commercial opportunities.

OpenAI's transformation from a nonprofit research lab to a company valued at over $300 billion is unprecedented in the technology industry. The outcome of this trial could establish legal precedents for how nonprofit-to-profit conversions are scrutinized, particularly in the AI sector.

Other major players are watching closely. Anthropic, which was founded by former OpenAI researchers and operates as a public benefit corporation, has its own complex corporate structure. Google DeepMind, Meta AI, and other frontier labs face ongoing questions about balancing safety commitments with commercial pressures.

The trial also arrives at a moment when AI regulation is at the top of the policy agenda in both the United States and Europe, making the public airing of internal governance disputes at OpenAI particularly consequential.

What This Means for the AI Industry

Regardless of the verdict, this trial is reshaping public understanding of how major AI organizations operate behind closed doors. The testimony has revealed:

• Internal tensions about safety review processes at OpenAI
• The complex personal relationships that influenced early AI governance decisions
• How financial contributions create expectations — but not necessarily legal rights
• The difficulty of maintaining nonprofit missions in a sector flooded with billions of investment dollars

For developers and businesses building on OpenAI's APIs, the trial creates uncertainty but is unlikely to disrupt services in the near term. For policymakers, the revelations about internal governance failures strengthen the case for external regulatory frameworks.

Looking Ahead: What Comes Next in the Trial

The trial is expected to continue for several more weeks, with additional witnesses from both sides. OpenAI's defense team will likely call witnesses who can speak to the board's decision-making process and the legal basis for the corporate restructuring.

Musk's team faces a growing challenge: the witnesses they expected to support their case are delivering mixed or even counterproductive testimony. The Zilis situation in particular suggests that the personal relationships Musk relied on for his legal strategy may not translate into courtroom advantages.

If Musk's case continues to weaken, it could embolden OpenAI to accelerate its planned conversion to a fully for-profit entity — a move that has faced opposition from multiple state attorneys general and nonprofit watchdog organizations. Conversely, a strong showing by Musk in the remaining weeks could force OpenAI to make significant concessions about its corporate structure and governance commitments.

The stakes could not be higher. This is not just a lawsuit — it is a referendum on how humanity's most powerful technology will be governed, developed, and controlled.