Apple announced a partnership with OpenAI last year to integrate ChatGPT across its products. Musk responded to the announcement by threatening to ban Apple products at his companies. Grok is a rival AI offering to OpenAI’s ChatGPT and Alphabet unit Google’s Gemini, among others.

Elon Musk lashed out against Apple Inc.’s app store practices late on Monday, accusing the iPhone maker of favoring OpenAI.

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.