Apple rebuilds Siri on a 1.2-trillion-parameter Gemini model and opens iOS 27 to third-party AI defaults
Apple has rebuilt Siri from scratch on a custom Google Gemini model — 1.2 trillion parameters, ~$1B/year — routing the heaviest queries to Google Cloud on Nvidia Blackwell B200s while simpler requests stay on-device via Private Cloud Compute, delivering the AI overhaul it promised two years ago. iOS 27 also lets users designate Claude, ChatGPT, or Grok as the default AI for Siri and Writing Tools, opening Apple's billion-device installed base to third-party providers for the first time. Tim Cook steps down as CEO on September 1, handing the role to hardware chief John Ternus.
Source: techtimes.com ↗
Apple found that running a trillion-parameter model inside Private Cloud Compute was too slow to be usable at the scale Siri requires.
The Information
Why this matters
- → Apple offloads trillion-parameter reasoning to Google Cloud after two years of broken Siri promises.
- → iOS 27 opens default AI selection to Claude, ChatGPT, Grok for first time.
- → Three-tier query routing balances on-device privacy with frontier-model capability at scale.
Apple's AI pivot