Apple rebuilds Siri as 'Campos' on Google Gemini TPUs, with iOS 27 and Core AI framework at WWDC 2026

The Siri overhaul Apple has been hinting at for two years finally has shape. Multiple reports converge on the same picture: an internal codename ('Campos'), a custom model built jointly with Google's Gemini team, deployment on Google's TPU infrastructure rather than Apple silicon for the cloud tier, and a feature set explicitly designed to compete with ChatGPT, Claude and Gemini — web search, image generation, document analysis, file uploads, and an upgraded conversational interface.

The developer-facing piece is arguably bigger than the consumer piece. WWDC 2026 will introduce Core AI, a new framework intended to replace Core ML as the on-device ML substrate, and a third-party chatbot extension model that lets apps slot into Siri's new conversational surface. Source D adds that iOS 27 will ship a dedicated Siri app with a redesigned visual identity, expanded Apple Intelligence in Wallet, Safari and Shortcuts, an upgraded autocorrect keyboard, Apple Maps over satellite, and a wave of accessibility features including eye/head-controlled wheelchair support on Vision Pro and richer VoiceOver scene descriptions. BofA's note (cited by CNBC) frames a credible Siri as making Apple the 'front door' to AI search, commerce and payments — a thesis that hinges on actually shipping.

The Gemini-and-TPUs angle is the part that will dominate Twitter. Apple, the company that for a decade made on-device privacy its core AI differentiator, is now publicly building its flagship AI product on a competitor's silicon and a competitor's model team. The 'genai.apple.com' subdomain Source A flagged, plus Apple's parallel insistence on privacy controls — automatic chat deletion, tighter memory controls, more granular permissions — looks like the company trying to keep its privacy narrative intact while outsourcing the parts of the stack it can't ship on time.

What to watch at WWDC: the actual on-device vs cloud routing of Siri queries, the privacy-disclosure language Apple uses for Google-TPU-hosted traffic, the Core AI API surface for third-party model providers, and whether the new Siri app survives the brutal hands-on coverage that has greeted every Siri relaunch since 2018.