Apple's siri architecture allows integration with third-party AI models like claude and GPT-5.6

Developer 'pdfu' has uncovered code within iOS 27 and macOS Golden Gate that reveals Apple is building a new Siri AI architecture capable of integrating third-party models such as Claude from Anthropic and GPT-5.6 from OpenAI. The system uses a mechanism called 'Model Delegation,' allowing these models to function as Siri extensions, similar to the existing ChatGPT integration. In demonstrations, users can select Claude from the 'Ask…' menu in macOS and delegate tasks like creating reminders or generating CSV files, with Siri handling system-specific actions. A second protocol, 'Model Management Service,' enables users to replace the on-device Siri model entirely with alternatives like GPT-5.6. This allows models like ChatGPT to fully take over Siri's planning and tool definitions, executing system operations and generating responses through Siri's interface. The European Commission's Digital Markets Act is believed to have influenced Apple's decision, requiring equal access to hardware and software features for third-party services. While the 'Ask…' feature is currently limited to macOS 27, the code indicates Apple has made significant progress toward future model interoperability.