The Pulse
Apple Code Shows Siri Can Delegate to Claude and ChatGPT
Private frameworks in iOS 27 and macOS Golden Gate reveal Siri mechanisms for delegating requests to Claude or replacing Apple's server-side model with GPT-5.6. The capabilities are not yet available to ordinary users, but demonstrations sh
AI.info Team ·
“And here's an app extension replacing Siri AI's server model with GPT-5.6 Terra.”
pdfu, quoted by MacRumors
Apple has built private hooks that could let third-party models operate inside Siri at a much deeper level than the company’s existing ChatGPT handoff, according to code examined in iOS 27 and macOS Golden Gate.
The findings, published September 14 by MacRumors, describe two separate mechanisms. One, called Model Delegation, lets an external model such as Claude appear as a Siri extension. The other, an Inference Providing protocol inside Model Manager Services, appears to let an app replace Apple’s server-side Siri model while retaining Siri’s interface and access to system tools.
Claude Can Hand Tasks Back to Siri
In a video shared by the code researcher known as pdfu, a Mac user opens the “Search or Ask” interface and selects Claude from an “Ask...” menu. The demonstration then asks Claude to set a reminder in Apple’s Reminders app.
Claude interprets the request, while Siri creates the reminder. The arrangement suggests that a third-party model can handle the language interaction and return Apple-specific actions to Siri when the request requires access to a built-in service.
A second Claude demonstration asks the model to create a CSV file, a task that Siri itself cannot complete. Claude produces the file within the Siri application’s conversation window, showing that the extension can also handle work beyond Siri’s native system actions.
GPT-5.6 Receives Apple’s Planner and Tools
The deeper mechanism appears in the Inference Providing protocol. MacRumors reports that an inference provider can substitute another model for Apple’s server-side Siri system, including a model identified in the demonstration as GPT-5.6 Terra.
That model receives Apple’s native Siri planner prompt and tool definitions. It can then request system actions, receive personal data returned by those tools, and generate an answer that Siri presents through its own interface and voice.
In the video, the model searches emails about a subject, summarizes the messages and their action points, and sends a message to a contact through Apple’s Messages app. The resulting interaction is shown in OpenAI’s platform interface, according to MacRumors.
Private Frameworks, Public Limits
The discovery does not mean iPhone and Mac owners can currently choose Claude or another model as Siri’s default. The “Ask...” feature is limited to the ChatGPT extension in the macOS 27 Golden Gate Release Candidate, and Claude is not available through that interface.
Apple also has not opened the model-delegation entitlement to outside developers. The capability is not presented as a normal user-facing setting, so the code documents an architectural option rather than a released product feature.
That distinction matters because the two mechanisms appear to grant different forms of access. Model Delegation lets an app provide a Siri extension for explicitly directed requests, while Inference Providing appears to receive calls that would otherwise go to Apple’s own server-side Siri infrastructure.
Why the European Union May Matter
MacRumors suggests that the European Union’s Digital Markets Act may have influenced Apple’s design. The law requires designated technology companies to provide third parties with effective access to hardware and software features available to their own services, and the European Commission has said that principle applies to Siri.
The source does not establish that the code resulted from a specific regulatory order. It does show Apple preparing an architecture in which outside models could interact with the same personal data and system functions used by Apple’s own Siri services, subject to Apple’s approval.
Siri Becomes a Model Boundary
Apple’s current ChatGPT integration sends selected requests outward when Siri cannot answer them. The code described by MacRumors points to a different arrangement: Siri could become the operating-system layer that manages access to apps, personal information and device actions while the model performing the interpretation comes from another company.
That would give users a more direct choice of model without requiring each provider to recreate Apple’s system integrations. It would also put greater weight on Apple’s permission system, since a delegated model could potentially request personal data or actions that change the device.
For now, the evidence is confined to private frameworks, a release-candidate build and demonstrations by pdfu. Apple’s software can already show ChatGPT inside Siri, but the newly exposed hooks indicate that the company has designed the assistant to accommodate models beyond that single partnership.