This comes as Musk's long-running feud with OpenAI chief Sam Altman intensifies.

The lawsuit centers on Apple's recent deal to make OpenAI's ChatGPT the only generative AI chatbot on the iPhone's operating system, effectively shutting out xAI's Grok and other rivals, such as Google's Gemini and Anthropic. 

The lawsuit's introduction argues that Apple and OpenAI have teamed up to protect their monopolies in smartphones and AI chatbots:

This is a tale of two monopolists joining forces to ensure their continued dominance in a world rapidly driven by the most powerful technology humanity has ever created: artificial intelligence ("AI"). Working in tandem, Defendants Apple and OpenAI have locked up markets to maintain their monopolies and prevent innovators like X and xAI from competing.1 Plaintiffs bring this suit to stop Defendants from perpetrating their anticompetitive scheme and to recover billions in damages.

AI is fundamentally reshaping our world. Technology powered by AI has not only become embedded in our daily lives but is also transforming critical sectors like healthcare, education, and finance. The consensus among global business leaders, academics, and scientists is that AI adoption is both unavoidable and transformational—and businesses that do not plan for it risk falling behind.

As Apple now recognizes, AI poses an existential threat to its business. For example, AI is rapidly advancing the rise of "super apps"—i.e., multi-functional platforms that offer many of the services of smartphones, such as social connectivity and messaging, financial services, e-commerce, and entertainment—that do not require a customer to be tied to a particular device. In other words, super apps, like those being developed by X and xAI, stand ready to upend the smartphone market and Apple's entrenched monopoly in it.

The writing is on the wall. Apple's Senior Vice President for Services, Eddy Cue, has expressed worries that AI might destroy Apple's smartphone business, just as Apple's iPhone did to Nokia's handsets.

Apple knows it cannot escape the inevitable—at least not alone. In a desperate bid to protect its smartphone monopoly, Apple has joined forces with the company that most benefits from inhibiting competition and innovation in AI: OpenAI, a monopolist in the market for generative AI chatbots.