What is the hidden Siri Extensions framework in iOS 27?

An API in the iOS 27 developer beta that lets third-party AI assistants — confirmed targets are Anthropic's Claude, OpenAI's ChatGPT, and Google's Gemini — register as the system-default assistant on iPhone, replacing the built-in Siri for most user-facing assistant interactions. Bloomberg's Mark Gurman first reported the existence of a settings panel for switching default AI; The Next Web confirmed the underlying Extensions framework is present in the beta but not documented in any public WWDC session. Apple did not show or announce the feature at WWDC 2026 on June 8, despite the framework code being in the beta released the same day. This is the largest unannounced consumer iOS feature of 2026 so far, and if it ships as currently architected it is the biggest change to Siri's competitive position since Siri launched.

Why didn't Apple show iOS 27 Siri Extensions at WWDC 2026?

Three plausible reasons, none confirmed. (1) Negotiations not finalized — Apple is reportedly still negotiating commercial terms with Anthropic, OpenAI, and Google, and announcing the framework publicly before signing the partners reduces Apple's leverage. (2) Antitrust exposure — Bloomberg has reported potential legal action coming for Apple and OpenAI over the existing ChatGPT-in-Siri integration; expanding to multiple AI providers is exactly the kind of move that draws antitrust review, and Apple may be staging the announcement to follow regulatory clearance. (3) Apple Intelligence positioning — if Apple announced 'set Claude as your default AI' at the keynote, it implicitly conceded that Apple Intelligence is not the primary AI experience on iPhone. Apple's keynote framing was carefully built around Apple Intelligence as the user-facing assistant, with third-party AI as a fallback. Acknowledging Extensions undermines that framing. The feature is in the beta. The announcement is being staged later.

Can you actually use Claude or ChatGPT as your iPhone default in iOS 27 today?

Not yet on a shipping iPhone, but yes on developer beta if you build the entitlement yourself or wait for one of Apple's eventual partners to ship a beta build. As of June 16, 2026 the iOS 27 developer beta contains the Extensions framework and a settings panel, but no shipping Anthropic, OpenAI, or Google app has yet been updated to register as a default Siri Extension. Once one of them does, developer-beta users can switch their iPhone default. Most users will not have access until iOS 27 public release in September 2026 — and possibly later if Apple holds the feature back for an iOS 27.1 or 27.2 release. The feature is real, but consumers cannot use it today.

What does this mean for Apple Intelligence and Siri's future?

Two things in parallel. Apple Intelligence stays as the on-device privacy-preserving AI layer for tasks Apple wants to keep on-device — quick replies, summarization, image cleanup, focus filters, all the small features shipped under the Apple Intelligence brand. Siri Extensions stops the bleeding for the big conversational AI use case where Apple has clearly fallen behind. The architecture is sensible: Apple keeps on-device privacy for everyday phone tasks and outsources the hard conversational AI work to the partner that the user picks. The cost to Apple is positioning — it is the public acknowledgment that Apple cannot ship a competitive frontier conversational AI on its own. The benefit is the iPhone stays as the best device on which to use Claude, ChatGPT, or Gemini, which protects iPhone's high-end position. Long-term, expect Siri-the-brand to fade and 'your AI on iPhone' to mean whatever model you picked.

Quick Answer

iOS 27 Siri Extensions: Claude, ChatGPT, Gemini Hidden in Beta (June 2026)

Published: June 16, 2026

iOS 27 Siri Extensions: Claude, ChatGPT, Gemini Hidden in Beta (June 2026)

Apple’s iOS 27 beta contains the most significant iPhone AI feature of 2026, and Apple did not mention it at WWDC. An Extensions framework in the beta lets users set Claude, ChatGPT, or Gemini as the default assistant — replacing Siri — for most user-facing assistant interactions. This page covers what is actually in the beta, why Apple did not announce it, and what to expect.

Last verified: June 16, 2026.

TL;DR

iOS 27 developer beta contains a Siri Extensions framework with confirmed targets Claude, ChatGPT, and Gemini.
Apple did not show or announce the feature at WWDC 2026 on June 8, despite the code being in the beta released the same day.
Three plausible reasons: partner negotiations not finalized; antitrust positioning; protecting Apple Intelligence’s keynote narrative.
Consumers cannot use it today. No partner has shipped a beta build that registers as a default Siri Extension.
Public iOS 27 release is expected in September 2026. The feature may ship in 27.0, or held back to 27.1/27.2.

What’s actually in the beta

Bloomberg’s Mark Gurman broke the existence of the settings panel — a screen in Settings → Siri & Search that lists installed AI assistants and lets the user pick which one handles assistant invocations. The Next Web confirmed the underlying Extensions API is present in the beta, with hooks for:

Siri invocation — “Hey Siri” or the side-button hold triggers the chosen assistant.
Type-to-Siri — the typed Siri interface routes to the chosen assistant.
System actions — alarm/timer/reminder creation routes through the chosen assistant’s natural language parsing.
Cross-app actions — using app intents to invoke other apps from the assistant’s responses.

The framework reportedly does not expose:

Apple Intelligence’s on-device tasks (summarization, writing tools, image cleanup) — those stay native.
HomeKit and other privacy-sensitive integrations — those stay native.
The keyboard-suggestion and focus filter AI features — those stay native.

The pattern: Apple keeps everything on-device under the Apple Intelligence brand and lets the conversational assistant role go to a third-party.

Why Apple did not announce it

Three plausible reasons, in order of likelihood.

1. Partner negotiations are not finalized

Apple has only signed a public partnership with OpenAI so far — the existing ChatGPT-in-Siri integration that shipped in iOS 18. Reports from Bloomberg and others put Apple in active commercial negotiations with both Anthropic and Google for new partnerships. Until those deals close, Apple has commercial leverage by keeping the Extensions framework quiet. Announcing publicly that “Claude will run as your Siri” before signing Anthropic gives Anthropic leverage in the negotiation; staying quiet protects Apple’s position.

The Google partnership specifically is the trickier one — Google paid Apple billions annually for default search, but the AI assistant default is potentially a different commercial structure (Google paying Apple, Apple paying Google, or a revenue share). Until the dollar number is agreed, no announcement is possible.

2. Antitrust exposure

Bloomberg has separately reported potential legal action coming for Apple and OpenAI over the existing ChatGPT integration in Siri — allegations around how the partnership was structured and how user data flows. Apple announcing an expanded multi-partner framework before that legal situation is contained would be tactically unwise, because it commits Apple to a structure that may yet need to be modified in response to regulators.

3. Apple Intelligence keynote narrative

Apple’s WWDC 2026 keynote was carefully built around Apple Intelligence as the user-facing AI experience on iPhone. Tim Cook (in what is widely reported as his last WWDC keynote) framed Apple Intelligence as the answer to “what is AI on iPhone in 2026.” Announcing the Extensions framework simultaneously would have undermined that narrative — every reviewer would have written “Apple’s keynote talked about Apple Intelligence, but the actual feature is that you can pick a different AI.” Apple wanted the keynote to be about Apple. The Extensions framework, when announced, will be a separate news cycle.

Why it matters

For consumers

If iOS 27 Extensions ships as currently architected, iPhone becomes the best device on which to use Claude, ChatGPT, or Gemini, with deep system integration that Android cannot match without similar concessions. That is good for users and good for Apple’s high-end positioning, even though it concedes the “Apple wins conversational AI on iPhone” narrative.

For Claude users specifically, iOS 27 Extensions would let you set Claude as the default Siri, get Claude’s conversational quality through the native iPhone interface, and route system actions like reminders through Claude’s NLU. That is a much more useful Claude experience than the current Anthropic iPhone app.

For Apple Intelligence

Apple Intelligence shrinks in scope but gets cleaner. Instead of trying to be the conversational AI (which Apple has lost on), Apple Intelligence focuses on on-device privacy-preserving tasks where Apple genuinely has advantages — Private Cloud Compute, on-device summarization, focus filters, image cleanup. This is the right strategic move. Apple should have done it 12 months ago. WWDC 2026 was the first signal it is happening now.

For OpenAI, Anthropic, Google

Three different positions.

OpenAI already has the iOS 18 partnership and the most direct user funnel. ChatGPT-in-Siri as the existing default means many users will not change. OpenAI’s risk is being lumped in with two competitors instead of being the singular Apple partner.

Anthropic gets the largest relative win. Claude on iPhone today is a separate Anthropic-app experience; Claude as the default Siri Extension would put Claude in front of every iPhone user who opens the assistant. That is meaningful distribution for a company that has been weaker on consumer than on developer/enterprise.

Google gets a complicated win. Gemini on iPhone via Siri Extensions is great for Gemini users — but Google already wants iPhone users on the Gemini app, not on Siri-with-Gemini-underneath. The bigger question for Google is whether the Apple Search deal economics translate to the AI default deal economics, and that is the structurally hardest negotiation.

What to watch for

First partner shipping beta entitlement — expected within the iOS 27 beta cycle. Anthropic likely to move first because it has the most to gain.
Apple’s public announcement — likely between iOS 27 GA (September 2026) and a possible 27.1/27.2 fall update.
Settings UI in public beta — the developer beta has the framework but the consumer settings UI may not appear until later betas.
Antitrust developments — if the rumored Apple-OpenAI legal action materializes, the Extensions framework’s launch timeline shifts.
EU specifically — EU regulators have been pushing Apple toward exactly this kind of unbundling. EU iOS 27 may get Extensions before the US version, mirroring the iOS 27 app sideloading EU-first rollout pattern.

Bottom line

Apple’s iOS 27 beta has the most consequential iPhone AI feature of 2026, and Apple has chosen to keep it quiet while it finalizes partnerships and manages regulatory exposure. The Extensions framework is real. Claude, ChatGPT, and Gemini will all eventually ship as default Siri Extensions on iPhone. The September iOS 27 release is the earliest plausible window; iOS 27.1 or 27.2 is more likely.

For the AI competitive landscape, this is the moment Apple admits it cannot ship a competitive conversational AI on its own and pivots to being the best device on which to run someone else’s. That is a strategically sound move and the right one for users, even if it reframes what “Siri” means for the long term.

iOS 27 Siri Extensions: Claude, ChatGPT, Gemini Hidden in Beta (June 2026)

TL;DR

What’s actually in the beta

Why Apple did not announce it

1. Partner negotiations are not finalized

2. Antitrust exposure

3. Apple Intelligence keynote narrative

Why it matters

For consumers

For Apple Intelligence

For OpenAI, Anthropic, Google

What to watch for

Bottom line

See also