Two of Elon Musk’s companies sued Apple and OpenAI on Monday, accusing the pair of an “anticompetitive scheme” to thwart artificial intelligence rivals.

The lawsuit, filed by Musk’s AI startup xAI and his social media platform X, alleges Apple and OpenAI have “colluded” to maintain monopolies in the smartphone and generative AI markets.

It also accuses Apple of deprioritizing so-called “super apps” and generative AI chatbot competitors, such as xAI’s Grok, in its App Store rankings.

“Unless the court enjoins Apple and OpenAI’s unlawful conduct, defendants will continue to thwart competition, and their competitors, like plaintiffs, will continue to suffer the anticompetitive consequences,” according to the complaint, which was filed in U.S. District Court for the Northern District of Texas.

Musk earlier this month threatened to sue Apple for “an unequivocal antitrust violation,” saying in a post on X that the company “is behaving in a manner that makes it impossible for any AI company besides OpenAI to reach #1 in the App Store.”

Representatives from OpenAI and Apple didn’t immediately respond to requests for comment.

This is breaking news. Please refresh for updates.