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.

Elon Musk has threatened Apple with legal action for what he perceives as overt favoritism towards OpenAI's ChatGPT app in its App Store rankings. In a series of posts on X on Monday, he wrote that Grok, the chatbot created by his own company xAI, was being unfairly penalized by the iPhone -maker.