Elon Musk is threatening immediate legal action against Apple, alleging antitrust violations. This stems from Apple's integration of ChatGPT, developed by OpenAI, into its products. Currently, ChatGPT holds the top spot in the free apps section of the American iOS App Store. Musk's concerns likely revolve around the potential for Apple to leverage its platform power to unfairly promote ChatGPT and disadvantage competing AI technologies.