OpenAI mocks Musk’s math in suit over iPhone/ChatGPT integration (arstechnica.com)

OpenAI and Apple have asked a court to toss an antitrust suit from Elon Musk’s xAI that claims ChatGPT’s integration into some iPhone features gives OpenAI a monopoly on “prompts” and lets Apple shut out rivals. The lawsuit, spurred by Musk’s complaint that Apple didn’t list Grok on its curated “Must Have” apps while ChatGPT appeared frequently, argues the Siri tie-in channels billions of user prompts to OpenAI and therefore to its training pipeline. OpenAI and Apple counter that the claims are speculative and legally insufficient, filing to dismiss the case as based on flimsy arithmetic and conjecture. Technically, xAI’s purported “up to 55%” share of potential chatbot prompts rests on dividing an assumed 1.5 billion Siri requests per day by an estimated 2.7 billion daily generative-AI prompts—numbers OpenAI calls “back‑of‑the‑envelope” and misleading. OpenAI stresses the integration is limited to newer iPhone models, requires users to opt in, and mandates account linking for any training-data access, substantially narrowing the actual prompt pool. The dispute highlights broader AI issues: how platform integrations can affect data access and competitive dynamics, and the legal scrutiny that will follow when companies claim training advantages based on user interactions and platform partnerships.