Apple on Thursday rejected Elon Musk's claim that its digital App Store favors OpenAI's ChatGPT over his company's Grok and other rival AI assistants.App Store rankings listed ChatGPT as the top free app for iPhones on Thursday,

Musk called Apple’s App Store rankings an “unequivocal antitrust violation” in a post on his social-media platform X on Monday night and threatened “immediate legal action.” “Apple is behaving in a manner that makes it impossible for any AI company besides OpenAI to reach #1 in the App Store,” he said in the post.

Elon Musk has accused Apple of unfairly favoring ChatGPT on its App Store and threatened legal action, triggering a fiery exchange with OpenAI CEO Sam Altman on Tuesday.DeepSeek and Perplexity compete with OpenAI and Musk's startup xAI.