Elon Musk filed a lawsuit on Monday against OpenAI and its co-founders, Sam Altman and Greg Brockman, accusing them of straying from the organization’s original mission of benefiting the public and instead focusing on profits. The lawsuit, presented in a Northern California federal court, describes Musk’s case as a classic conflict between altruism and greed. It alleges that Altman and others misled Musk, exploiting his genuine concerns about the risks of artificial intelligence.

Musk was an early investor in OpenAI when it was founded in 2015 and served as co-chair of its board with Altman. He claims to have invested “tens of millions” of dollars and helped recruit leading AI researchers for the organization. Musk resigned from the board in early 2018 to avoid conflicts of interest, as he was working on self-driving technology at Tesla. He had previously dropped a related lawsuit against OpenAI in June without giving a reason. That lawsuit had claimed that Musk’s funding was based on an agreement to keep OpenAI a nonprofit that would develop technology for the public good and maintain open-source code.

An OpenAI spokesperson responded by saying, “As we mentioned about Elon’s initial legal filing, which was later withdrawn, his previous emails still reflect his position.” In March, OpenAI released emails showing Musk’s earlier support for transitioning the company to a for-profit model.

In this new lawsuit, Musk argues that Altman and his associates betrayed the core mission of OpenAI. The complaint characterizes the alleged betrayal as “Shakespearean in its deceit.”