Greg Brockman, a co‑founder and chief technology officer of OpenAI, took the stand Tuesday in the federal case filed by Elon Musk. The lawsuit accuses the AI lab of mismanagement and seeks to restructure its governance. Brockman's testimony offered the clearest view yet of OpenAI's formative months, its financing, and the interpersonal dynamics that shaped its direction.

Lawyers for Musk began by cross‑examining Brockman in an unusual order, forcing him to answer direct questions before facing rebuttals. Throughout, Brockman repeatedly prefaced answers with qualifiers such as “I wouldn’t characterize it that way,” and “That sounds like something I wrote; can I see it in context?” His meticulous phrasing frustrated both sides but underscored his intent to stay precise.

Early days and the Altman‑Musk dynamic

Brockman recounted that Sam Altman was present far more often than Musk during the startup’s infancy. He described a memorable episode when the founding team spent an hour and a half stuck in traffic, oblivious to the delay because they were enjoying each other's company. He also cited Ilya Sutskever’s early concerns about Musk’s potential to create a stressful work environment, noting a text from Sutskever that warned, “Elon might spend half a day a week with us; I imagined how it will be and I worry that our work environment can become very stressful.”

The testimony revealed that Brockman left Stripe after telling Altman he was “thinking about doing an AI thing.” Altman responded in kind, and the two kept in touch, eventually meeting in Menlo Park for a dinner that Musk arrived to an hour late. The evening centered on artificial general intelligence, and Brockman later rode home with Altman.

Financial entanglements and the Microsoft deal

When asked about Microsoft’s $10 billion infusion, Brockman clarified that it was the only ten‑billion‑dollar investment OpenAI received. He emphasized that the deal was “not really my focus area,” suggesting limited personal involvement. Brockman also disclosed his equity stakes in Cerebras, Stripe, CoreWeave and Helion—companies that have contracts with OpenAI. A December 2025 Cerebras chip purchase worth $10 billion, which boosted Cerebras’s valuation to $23 billion, raised questions about whether Brockman's personal holdings benefited from the transaction.

Perhaps most striking was Brockman's admission that part of his compensation came from a grant arranged through Sam Altman’s family office. An email from Altman's office to Musk’s advisor Jared Birchall indicated that the grant was intended to deepen Brockman's allegiance to Altman. Musk’s counsel framed this as a “side‑deal” that Musk was not told about, implying a conflict of interest that could undermine OpenAI’s nonprofit roots.

Throughout the direct examination, Brockman maintained a calm demeanor, though he occasionally appeared nervous when pressed about the nonprofit‑to‑for‑profit transition. He rejected the notion that the nonprofit should remain purely philanthropic, stating forcefully, “No.” He also referenced journal entries where he wrote, “We’ve been thinking about maybe we should just flip to a for‑profit. Making money for us sounds great and all,” describing the note as an expression of frustration rather than a concrete plan.

The courtroom drama extended to seemingly trivial details, such as the use of purple highlight boxes in OpenAI’s paperwork. Musk’s attorney, Steven Molo, asked whether the boxes were a standard practice; Brockman answered they were not, leading to a prolonged back‑and‑forth on the matter.

While Brockman's testimony lacked the theatrical flair of Musk’s cross‑examination, it supplied the trial with concrete evidence of internal decision‑making, financial relationships, and the evolving mission of OpenAI. Observers noted that the granular nature of his answers—down to correcting missing articles like “a” or “the”—could influence the jury’s perception of credibility.

The trial, still in its early stages, now hinges on how the judge and jury interpret Brockman's disclosures. If the court finds that the financial ties and internal debates compromised OpenAI’s original nonprofit intent, Musk’s push for a structural overhaul could gain traction. Conversely, OpenAI’s legal team may argue that the disclosed relationships are standard for a fast‑growing tech venture.

Beyond the courtroom, the case underscores broader concerns about governance in the rapidly expanding AI sector. As AI models approach artificial general intelligence, questions about accountability, funding sources, and corporate control become increasingly salient for investors, regulators and the public.

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