At the time of writing, ChatGPT is listed as Apple’s top free iPhone app in the US, with Grok ranked as the sixth. China’s DeepSeek AI briefly managed to take the top App Store position from ChatGPT in January, however, disproving Musk’s claim that it would be impossible for other AI apps to do so.

OpenAI CEO Sam Altman called out Elon Musk after the chief executive of X threatened to sue Apple, accusing the tech company of “relentlessly promoting” the owner of the popular platform ChatGPT at the expense of his xAI company.

Elon Musk said his artificial intelligence start up xAI will sue Apple for allegedly favoring AI competitors in its App Store in what he called a breach of antitrust regulations. In a series of posts on X on Monday,