OpenAI Fires Back at Elon Musk With Old Emails and a $45M Reality Check

The spat between Elon Musk and OpenAI just got a lot more public, and a lot more personal. OpenAI published a blog post detailing its version of the messy breakup, complete with old emails from Musk himself. The core of their argument? Musk knew the non-profit structure was never going to be enough to fund the sheer compute required for AGI, and his lawsuit is a rewrite of history. They claim he pushed for a $1 billion funding commitment from day one, but in reality, his total contributions to the non-profit were less than $45 million. That’s a stark contrast to the more than $90 million that came from other donors. Reid Hoffman even had to step in to cover salaries when Musk suddenly stopped funding the project during contentious for-profit negotiations in late 2017.

Those negotiations went completely off the rails, according to OpenAI. The company claims Musk demanded majority equity, initial board control, and the CEO title for himself within the new for-profit entity. When the founding team balked — arguing that absolute individual control violated the core mission of broadly distributing the benefits of AI — Musk suggested folding OpenAI into Tesla to act as a “cash cow.” An email they published shows Musk forwarding a note that called Tesla “the only path that could even hope to hold a candle to Google,” a path he soon deemed necessary because he gave OpenAI’s independent chances a “probability of success” of zero.

The blog post also takes a swing at the hypocrisy angle. Musk’s lawsuit leans on the idea that OpenAI’s name implied a promise to open-source its technology. OpenAI counters by publishing an email exchange where co-founder Ilya Sutskever explicitly told Musk that as AI gets closer to reality, it makes sense to be “less open” and not share the science. Musk’s one-word reply? “Yup.” The company argues the “Open” in OpenAI was always about ensuring the fruits of AI benefit everyone, not about dumping all research onto GitHub. They cite current use cases, like Albania using their tools to speed up EU accession by 5.5 years and a healthcare provider simplifying surgical consent forms, as proof they’re fulfilling that mission.

It’s a sad and strange endgame for a relationship that started with such high-minded ambition. The blog post’s tone is weary, stating they’re “sad that it’s come to this with someone whom we’ve deeply admired.” The subtext is hard to miss: the man who inspired them to aim higher later told them they’d fail, started a direct competitor, and only sued once they started making meaningful progress without him. OpenAI is now asking the court to assign the case to dedicated management, given that the claims span nearly a decade and involve complex AI technology. The fight is just getting started, and it’s already deeply personal.