Apple has rejected accusations from Elon Musk that its App Store stifles competiton, insisting it is "designed to be free and fair of bias." X owner Musk has threatened Apple with legal action after claiming it had made it "impossible" for apps to compete with ChatGPT-maker OpenAI in the store He also called OpenAI boss Sam Altman a "liar" - after Altman claimed Musk used his platform to "benefit himself and his own companies".

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.

A federal judge on Tuesday rejected Elon Musk’s request to dismiss claims brought by OpenAI accusing the tech billionaire of engaging in a “years-long harassment campaign” against the company. U.S. District Judge Yvonne Gonzalez Rogers ruled OpenAI’s counterclaims are “sufficient” and can move forward as part of the lawsuit Musk brought against the ChatGPT