Substantial code references in the latest iOS 27 and macOS Golden Gate betas reveal that Siri AI is already set up to let users replace it with alternatives. Frequent leaker "pdfu" has demonstrated using Claude in place of Siri AI, showing it can appear in Siri's "Ask" menu. The same developer demonstrated replacing Siri AI's server model with GPT-5.6 Terra using the Inference Providing protocol in Model Manager Services.

While not officially available yet, this mirrors how iOS and macOS have used ChatGPT as a Siri extension since 2024. When enabled, Claude or ChatGPT appear in Siri's "Ask..." menu, with responses prefixed by the model name. Critically, Siri AI retains access to personal data, relaying system actions like setting alarms when needed.

This extensive option allows users to leverage better-performing alternatives while keeping Siri as the primary interface.