Musk in Court: The Friendship That Built OpenAI, Now a Legal Exhibit

Elon Musk has told the story before. In interviews, on podcasts, to Walter Isaacson for that biography. But Tuesday was the first time he said it under oath, and that changes the weight of every word.

He was on the stand in a San Francisco courtroom, relitigating not just the founding of OpenAI but an old friendship with Sam Altman. The trial, which Musk initiated, is technically about breach of contract and whether OpenAI abandoned its nonprofit mission. But what came through in his testimony was something messier: a founder who still can’t let go of the company he helped create, and a relationship that soured into something neither party seems willing to bury.

Musk walked through the early days with the kind of detail you’d expect from someone who has rehearsed this narrative many times. He described meeting Altman at a dinner in 2015, bonding over a shared fear that Google would dominate AI. They were both paranoid about DeepMind, and that paranoia became the seed of OpenAI. Musk said he personally recruited Ilya Sutskever, the star researcher who would later become central to the company’s drama, and that he spent countless hours in early strategy sessions.

What struck me was how personal it all sounded. Musk described Altman as charming and ambitious, but also hinted at a pattern he now sees as manipulative. He said Altman would agree with him in private meetings and then do something different once Musk left the room. That’s not a legal argument. That’s a man nursing a grudge.

The courtroom exchanges got sharp at times. Musk’s lawyer pushed him to recount specific emails and board votes, but the plaintiff kept drifting back to feelings — betrayal, disappointment, a sense that the company he helped birth had been stolen from him. The defense, predictably, jumped on that. They pointed out that Musk had signed agreements, that he had left the board voluntarily in 2018, that he had funded competitors like xAI. If OpenAI wronged him, why did he wait so long to sue?

Musk’s answer was revealing: because he didn’t want to hurt the company. He said he held back for years out of loyalty to the mission and the people still there. That might be true, or it might be convenient. Either way, it’s a far cry from the aggressive legal posture he’s taken now.

I found myself wondering what this trial is really about. The legal arguments are thin — Musk’s claim that OpenAI breached a founding agreement to remain nonprofit is creative but unlikely to hold up. The company has been transitioning to a for-profit structure for years, and even Musk’s own emails from 2017 show he was pushing for a for-profit model. The real dispute seems to be about credit, control, and a friendship that curdled.

Altman hasn’t testified yet, but his legal team has already signaled they’ll paint Musk as a disgruntled founder who wanted to run OpenAI himself and left when he couldn’t. That’s not entirely unfair. Musk’s own history is full of companies he founded, funded, or influenced and then walked away from — Tesla, PayPal, SolarCity — each time with a story about betrayal.

What makes this trial different is the stakes. OpenAI is now a $300 billion company, and its relationship with Microsoft has made it one of the most powerful institutions in tech. Musk’s xAI is a direct competitor, and his lawsuit looks increasingly like a strategic move to slow OpenAI down while propping up his own narrative. If he wins, he could force changes to OpenAI’s structure. If he loses, he’s still made the company spend millions on legal fees and air its dirty laundry in public.

Either way, the testimony this week confirmed something I’ve suspected for a while: Musk and Altman’s falling out was never really about money or mission. It was about two ambitious people who couldn’t share the spotlight. The courtroom is just the latest stage for a drama that’s been unfolding for a decade.

The trial continues this week, with Altman expected to take the stand. I’ll be watching, not for the legal outcome, but for the next chapter of a story that’s as much about ego as it is about AI.