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.

OpenAI has laid out plans to become a for-profit company. In a blog post published on Friday, OpenAI’s board said it will replace the company’s existing structure with one that puts control into the hands of its for-profit arm.