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.

As Fortune reported in September, Altman told his staff at the time that OpenAI would next year become a more traditional for-profit company. In its latest blog post, the company publicly confirmed the planned change for the first time.

OpenAI on Friday laid out a plan to revamp its corporate structure next year, saying it would create a public benefit corporation to manage its growing business and ease the restrictions imposed by its current non-profit parent.