❯ OpenAI says in Musk’s antitrust suit that ChatGPT in Apple’s Siri “dramatically underperformed” and brought few new users

the filingOpenAI said in new court filings that the ChatGPT integration behind Apple Intelligence on iPhones, launched in 2024, “dramatically underperformed,” according to the Financial Times and 9to5Mac. The filings show the integration “appeared to be off to a slow start” a month after launch, prompting OpenAI to cut its forecast for weekly active users. OpenAI later described it as “persistently underperforming,” and the two companies held a conversation in March 2026 whose contents are redacted.

why nowThe filings come in SpaceXAI’s (formerly xAI) antitrust suit against Apple and OpenAI. Musk sued in August 2025, alleging the two companies had an exclusive deal that hurt xAI’s growth. OpenAI is now asking the judge to rule in its favor before trial on two grounds: the contract shows the deal was not exclusive, and even if it were, the integration brought ChatGPT few new users, so xAI cannot show harm. Trial is set for January 2027.

a partnership gone sourUsing ChatGPT in Siri required a multistep opt-in, and that friction alone put many users off. Apple has since put Google’s Gemini into the new Siri, and Xcode now supports coding agents from Anthropic, Google and OpenAI.

▪ SIGNALTo win an antitrust case, OpenAI has publicly admitted its biggest distribution deal failed, which weakens its hand in future talks with other phone makers.