The leak that reveals: How you can replace the brain with Apple's AI model

A developer leak on X reveals code in upcoming versions of Apple's operating systems, iOS 27 and macOS Golden Gate, that allows replacing Siri's AI model with external models like ChatGPT or Claude. The mechanism includes 'model delegation' and full replacement of the server model, with access to personal information and system operations. The openness is attributed to the European Union's Digital Markets Act.

A software developer named pdfu leaked code on X from Apple's upcoming macOS Golden Gate and iOS 27 versions, indicating deep integration of external AIs into Siri. The first mechanism, 'model delegation,' allows selecting a model like Claude directly from Siri, which will understand requests and pass them for system execution. The second mechanism allows completely replacing Siri's server model with an external model like OpenAI's GPT-5.6 Terra, which will gain access to Apple's tool settings, perform system operations, and access personal information. A circulated video shows the model finding emails, summarizing them, and sending a message. The openness is attributed to the EU's Digital Markets Act, which requires effective third-party access. Currently, the option is limited to the ChatGPT extension in macOS 27 Golden Gate RC, and Claude is not yet available. The infrastructure is ready for a future where Siri is an interface and the user chooses the AI.