One of OpenAI’s co-founders, billionaire Elon Musk, has filed for an injunction to halt the company’s transition to a for-profit, accusing OpenAI of abandoning its original philanthropic mission. Musk has also alleged that OpenAI has deprived his own AI company, xAI, of capital by extracting promises from investors not to fund it.

Under OpenAI’s current nonprofit structure, there is a cap on the returns that its backers can realize. Additionally, investors reportedly had to sign an agreement that states it “would be wise to view any investment in [OpenAI’s for-profit subsidiary] in the spirit of a donation.”