Elon Musk on Monday targeted Apple and OpenAI in an antitrust lawsuit alleging that the iPhone maker and the ChatGPT maker are teaming up to thwart competition in artificial intelligence.

Elon Musk’s xAI filed a lawsuit against Apple and OpenAI on Monday, accusing the companies of behaving like monopolies and claiming Apple deprioritized ChatGPT rivals like Grok in the App Store.

AI also accuse Apple’s Apple Store of “deprioritizing” rival chatbots and “super” apps, including Grok and X. Musk’s companies claim that iPhone users “have no reason” to download third-party AI apps because the company “force[s]” users to use ChatGPT as their default chatbot app when enabling Apple Intelligence.