Apple Rebuilds Siri on Google Gemini — and Lets You Swap It for Claude or ChatGPT

By Hector Herrera | June 8, 2026 | Business

Apple overhauled Siri at WWDC 2026 by replacing its aging in-house language model with Google's Gemini — and then went further, giving users an "AI Extensions" framework to route queries to Claude or ChatGPT instead. It is the most consequential change to Siri since the assistant launched in 2011, and it repositions Apple from AI builder to AI broker.

Background

Siri has been the butt of every "voice assistant is broken" joke for years. While ChatGPT hit 500 million weekly users and Google rebranded its assistant around Gemini, Siri still struggled with basic multi-step requests. Apple's own engineers reportedly debated building a next-generation model internally but concluded the gap to close was too large and the timeline too short. The result is a licensing arrangement rather than a homegrown model — a significant strategic concession from a company known for vertical integration.

What Was Announced

• Gemini as the default engine. Under a reported $1 billion per year licensing deal with Google, Siri's responses in iOS 27 will be generated by Gemini's model. Apple says queries run through its Private Cloud Compute infrastructure, meaning Google's servers process encrypted requests but do not retain user data or tie responses to a Google account.
• AI Extensions framework. iOS 27 introduces a system-level API that lets users designate a preferred AI engine — Gemini (default), Anthropic Claude, or OpenAI ChatGPT — for Siri queries that require deep reasoning. The routing happens at the OS level; developers do not need to build separate integrations.
• Tim Cook's final WWDC. Cook called the Siri redesign "the biggest in the assistant's history" and confirmed it will be his last WWDC keynote as CEO. Apple's board announced in March that John Ternus, currently SVP of Hardware Engineering, will assume the CEO role on September 1, 2026.

What the B/Year Gemini Deal Actually Means

Apple is already paying Google an estimated $20 billion per year to keep Google as the default Safari search engine. Adding a separate $1 billion AI licensing payment deepens a commercial dependency that antitrust regulators on both sides of the Atlantic are already scrutinizing. The Department of Justice's ongoing case against Google's search monopoly explicitly targeted the Safari default arrangement; a new AI licensing deal adds a second commercial tie to weigh.

For Google, the deal is a distribution coup. Gemini becomes the default AI model for roughly 1.5 billion active iPhone and iPad users the moment they update to iOS 27 — a larger installed base than any standalone AI product has ever reached.

The AI Extensions Play: Why Apple Became a Platform, Not a Model

The more surprising move is the Extensions framework. By building an open routing layer into iOS 27, Apple is acknowledging that it cannot — and perhaps should not — bet users on a single AI backend.

Here is how it works in practice: a user asks Siri to draft a legal summary. iOS checks the user's preferred AI extension setting. If it is set to Claude, the request is routed through Anthropic's API (with Apple's privacy envelope). The response comes back through Siri's voice and interface, not a third-party app. From the user's perspective, Siri answered. From Anthropic's or OpenAI's perspective, they handled the query.

This is the same playbook Apple ran with music (buying Beats, licensing Spotify) and payments (Apple Pay routing Visa/Mastercard). Build the trusted interface; let the specialists handle the underlying service.

Impact

For consumers: iOS 27's Siri will be meaningfully more capable for complex, conversational tasks. The ability to choose your AI engine — and have that choice respected across apps without switching between Siri and a third-party app — removes a persistent friction point.

For Anthropic and OpenAI: Distribution through the iOS AI Extensions API could be significant, but the terms matter. If Apple takes a revenue share from enterprise API calls routed through the framework, or if consumer usage tiers are metered and billed through Apple's App Store payment rails, the economics shift substantially.

For Google: The default position in Siri is worth more than the $1 billion figure suggests. Default status in search has historically translated to 60–70% of query volume even when alternatives exist. A similar dynamic in AI would make Gemini the dominant personal AI model by installed base within 12 months of iOS 27's release.

For the AI industry broadly: Apple's move signals that the platform layer — controlling the interface, privacy envelope, and routing logic — is where durable value accumulates. Model providers may find themselves commoditized even as their technology improves.

What to Watch

iOS 27 ships to the public in September 2026. Watch whether the AI Extensions framework arrives in version 1.0 with Claude and ChatGPT support baked in, or whether those integrations roll out post-launch. The DOJ's Google antitrust case may also scrutinize whether the Gemini licensing deal is structured to foreclose competition in ways that go beyond the Safari search default.

Hector Herrera covers AI business strategy and enterprise technology at NexChron.