Tesla CEO and billionaire Elon Musk has filed an amended complaint in his ongoing suit against OpenAI, naming Microsoft and California Attorney General Rob Bonta as additional defendants and adding both federal and state antitrust allegations to his original fraud and breach-of-contract claims against the ChatGPT maker.

The amended suit includes 11 additional causes of action for a total of 26, including self-dealing under California Corporations Code §5233 and antitrust violations of the Clayton Act and California's Cartwright Act. The filing also adds as new plaintiffs Musk's artificial intelligence startup X.AI Corp. and Shivon Zilis, the CEO of Musk-founded neurotechnology company Neuralink. Zilis is a former OpenAI board member and mother of three of Musk's children. Other co-defendants added to the claim include LinkedIn co-founder and former OpenAI board member Reid Hoffman and Microsoft executive Deannah Templeton.