Elon Musk said Apple is behaving anticompetitively by promoting OpenAI’s ChatGPT while suppressing his Grok AI chatbot in the App Store, renewing his criticism of the iPhone maker’s partnership with OpenAI.

The response comes after Musk threatened to sue Apple via xAI, claiming the iPhone maker was “behaving in a manner that makes it impossible for any AI company besides OpenAI to reach #1 in the App Store.

The billionaire said in posts on X that the consumer tech giant was violating antitrust laws by giving preferential treatment to OpenAI on the App Store.