Apple's Siri Rebuilt on Google Gemini at WWDC

Apple will unveil a comprehensively rebuilt Siri at its WWDC 2026 keynote, scheduled for Monday, June 8, at 10 AM PT (2 AM KST on June 9). The keynote will stream on apple.com, the Apple TV app, and Apple's official YouTube channel, followed by the Platforms State of the Union session detailing the new APIs and technical integration for developers. This Siri overhaul, delayed for nearly two years since the 2024 Apple Intelligence announcement, headlines the WWDC event.

Powered by a 1.2-Trillion-Parameter Gemini Model

A key point of interest is the source of the upgraded assistant's intelligence. According to a Bloomberg report on November 5, 2025, Apple is rebuilding Siri on a custom 1.2-trillion-parameter Gemini model designed by Google. This model is roughly eight times the size of the approximately 150-billion-parameter cloud models Apple previously deployed.

This integration does not simply bolt the public version of Gemini onto the assistant. While built on a Gemini foundation, the model has been realigned and retrained specifically for Apple's software stack. Gurman first reported Apple's interest in this approach on August 22, later detailing the model size and licensing costs in his November report. He cautioned, however, that success is not guaranteed, noting that users may not embrace the changes and that the upgrade might not easily undo years of damage to the Siri brand.

A $1 Billion Annual Fee and Private Cloud Infrastructure

The financial terms represent another major facet of the agreement. Apple will pay Google approximately $1 billion annually for the technology. The two companies officially confirmed their multi-year partnership in a joint statement on January 12, 2026, as reported by Reuters.

Crucially, the custom model will run on Apple's own Private Cloud Compute infrastructure, ensuring user data is not sent directly to Google and the branding remains strictly Apple's Siri. This arrangement aligns with Google's aggressive efforts to secure AI computing resources. Apple reportedly evaluated OpenAI and Anthropic before selecting Google. The new chatbot-like conversational interface, personal context awareness, and on-screen understanding will roll out incrementally through iOS 27 and subsequent updates rather than debuting all at once. Ultimately, the success of this Siri overhaul will hinge on the user experience that follows the WWDC stage.