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Code shows Apple Siri AI could be replaced with Anthropic Claude or OpenAI ChatGPT
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- DeepHorus
On September 15, developer “pdfu,” after digging deep into the code of iOS 27 and macOS Golden Gate, discovered that Apple had designed its new Siri AI architecture in its private frameworks to collaborate deeply with third-party AI models. Related demo videos show that Anthropic’s Claude and OpenAI’s GPT-5.6 models can both connect to the Siri framework. This discovery means Apple’s voice assistant may no longer be limited to its own models in the future.
One mechanism is called “Model Delegation,” which allows Claude to appear as a Siri extension, similar to the currently built-in ChatGPT extension. In a video demo posted by pdfu, macOS users can bring up the “Search or Ask” bar and select Claude as the AI model through the “Ask…” menu. This mechanism shows that Apple has reserved an interface for external models at the system level.
After enabling the Claude extension, the user asked Siri to “let Claude” create a reminder in the Reminders app. Claude was responsible for parsing this natural-language request, then handed the task over to Siri to create the actual event reminder. This means that when a request involves Apple system functions, Claude still hands execution authority back to Siri.
In another example, Claude received a request within the Siri app conversation window to create a CSV file, a task Siri itself cannot handle, and Claude still successfully returned a result. This shows that third-party models can help users complete functions Siri cannot implement, thereby expanding the assistant’s overall capability boundary.
More noteworthy is the second protocol demonstrated in the video, the Inference Provider in the “Model Management Service,” which is more open and allows users to completely replace Apple’s on-device Siri model with other models, such as GPT-5.6. In this mode, ChatGPT can fully take over Apple’s Siri planner and tool definitions, thereby requesting system operations, receiving returned personal data, and generating answers presented by Siri with its own interface and voice.
In the demo video, the user asked ChatGPT to find emails on a specific topic within the Siri app, summarize their content and to-dos, and then send a message to a contact via the Messages app. The relevant responses subsequently appeared in logs on the OpenAI platform’s web interface. These operations involve sensitive data such as email, messages, and reminders, raising external concerns about privacy boundaries.
Most media believe that the EU’s Digital Markets Act may have influenced Apple’s decision. The regulation requires Apple to provide third parties with access to iOS hardware and software functions equivalent to its own services, and the European Commission has clearly stated that this principle applies to Siri AI. Regulatory pressure is seen as an important driving force behind Apple’s opening up model access.
Currently, the “Ask…” feature is limited to the ChatGPT extension only in the macOS 27 Golden Gate release candidate, and Claude is not yet available. Apple has also not opened model delegation authorization to third parties, and the feature is not exposed to users. However, the code shows that Apple has made fairly in-depth engineering preparations for future model interoperability, and the direction ahead remains to be seen.
