Monday September 14, 2026 4:37 americium PDT by Tim Hardwick
Code sleuth "pdfu" has uncovered iOS 27 and macOS Golden Gate backstage frameworks that show Apple has designed its caller Siri architecture to activity pinch third-party AI models astatine what appears to beryllium a amazingly heavy level.

One system called Model Delegation allows Claude to look arsenic a Siri hold successful the aforesaid measurement arsenic the existing built-in ChatGPT extension. In pdf's video, shared connected X, the macOS personification brings up the "Search aliases Ask" barroom and chooses Claude arsenic the AI exemplary via an "Ask..." contextual menu.
After enabling the Claude extension, the personification asks Siri to "Ask Claude" to group a reminder successful Apple's Reminders app. Claude past interprets the earthy connection reminder petition and Siri subsequently creates the reminder. The accusation is that if the petition requires entree to an Apple strategy feature, Claude hands the task backmost to Siri.
In different example, Claude tin beryllium seen successful a Siri app speech model receiving a petition to create a CSV record – thing Siri itself cannot grip – and successfully returning the result.
What's much intriguing is the 2nd protocol demonstrated successful the video that appears to spell considerably further, and could really unfastened up the AI scenery for Apple package requests.
An conclusion supplier successful "Model Manager Services" apparently allows Apple's ain server-side Siri exemplary to beryllium wholly replaced by different model, specified arsenic GPT-5.6. In this scenario, ChatGPT receives Apple's Siri planner punctual and instrumentality definitions, which enables it to petition strategy actions, person the resulting individual data, and formulate an reply that Siri presents utilizing its ain interface and voice.
And here's an app hold replacing Siri AI's server exemplary pinch GPT-5.6 Terra. It uses the Inference Providing protocol successful Model Manager Services. GPT-5.6 receives Apple's autochthonal Siri planner punctual and instrumentality definitions. It tin make instrumentality calls that execute strategy actions, and... pic.twitter.com/cz88kyq3io — pdfu (@itspdfu) September 13, 2026
In the objection video, the personification asks the ChatGPT exemplary (within the Siri app) to find emails astir a circumstantial topic, summarize their contents and action points, past nonstop an connection to a personification successful the user's contacts via the Messages app. The consequence is past shown arsenic logged successful OpenAI's level web interface.
The European Union's Digital Markets Act whitethorn person helped style Apple's attack here, arsenic it requires Apple to springiness 3rd parties effective entree to iOS hardware and package features disposable to Apple's ain services, and the European Commission has specifically said this rule extends to Siri.
The "Ask..." implementation is presently constricted to the ChatGPT hold successful the macOS 27 Golden Gate Release Candidate (which is efficaciously the last type of the package group to beryllium released later today), truthful Claude is not yet available. Meanwhile, Apple has not yet opened up the exemplary delegation entitlement to 3rd parties and it isn't front-facing to users, but it astatine slightest shows really extensively Apple has engineered Siri for early exemplary interoperability.
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