Elon Musk’s artificial-intelligence firm xAI, together with social-media platform X, filed a $1 billion antitrust lawsuit in U.S. federal court in Fort Worth, Texas, on Monday against Apple Inc. and OpenAI. The complaint alleges the two companies unlawfully conspired to lock up both the smartphone and generative-AI markets, violating U.S. competition law. According to the 61-page filing, Apple’s exclusive integration of OpenAI’s ChatGPT into iOS and its App Store ranking practices deprioritize rival chatbots such as xAI’s Grok and the X app, making it “impossible for any AI company besides OpenAI to reach No. 1” on the App Store. Musk argues the arrangement suppresses innovation, limits consumer choice and entrenches monopolies held by Apple in smartphones and by OpenAI in generative AI software. xAI is asking the court to halt the alleged scheme and award at least $1 billion in damages. Apple declined to comment, while an OpenAI spokesperson told WIRED the suit is “consistent with Mr. Musk’s ongoing pattern of harassment.” The action intensifies a long-running feud between Musk and OpenAI, which he co-founded in 2015 and sued separately last year over its for-profit shift. It also adds to growing antitrust scrutiny of Apple’s App Store policies, already the subject of regulatory probes and litigation from developers including Epic Games.