iOS 18 External Model Sensitive Query Warning

In iOS 18, Apple Intelligence integrates third-party AI tools like OpenAI's ChatGPT to handle complex queries that exceed on-device capabilities. This article details the specific warnings and confirmation dialogs iOS 18 displays when an external model query contains sensitive text, photos, or documents, explaining how the operating system safeguards user privacy before any data leaves the device.

The External Model Warning in iOS 18

When Siri or system writing tools determine that a query requires an external model, or when a user's prompt includes personal or sensitive text, iOS 18 does not send the data automatically. Instead, the system intercepts the request and triggers an explicit confirmation alert:

"Use ChatGPT?" (or the designated external provider)
"Siri will send this request, along with any attachments, to ChatGPT. ChatGPT’s privacy policy applies."

If the query contains attached files, sensitive clipboard data, or personal documents, the prompt specifically lists the data payloads being shared, displaying a direct preview of the text or attachments alongside options to "Send" or "Don't Send."

Why the Warning Appears

Apple Intelligence is designed with a privacy-first architecture that prioritizes on-device processing and Private Cloud Compute (PCC). Because external models operate outside Apple's end-to-end encrypted PCC ecosystem, iOS 18 mandates explicit consent whenever:

  • A query requires processing by a third-party server.
  • The input contains contextual personal data, such as private messages, photos, or document text.
  • Writing Tools or Siri hand off a generation task to an external provider.

Privacy Disclosures Displayed with the Warning

Alongside the confirmation dialog, iOS 18 informs users of the underlying privacy protections applied to external transmissions:

  • IP Masking: Queries are routed with obscured IP addresses so third parties cannot track user location or identity.
  • No Training Retention: For users accessing models without an account, external providers cannot store queries or use sensitive inputs to train future models.
  • Account Disclosures: If a user links their personal OpenAI account, iOS 18 provides an additional notice that the provider's standard account data-use policies take effect.

Managing External Query Prompts

Users have granular control over external model warnings in system settings:

  1. Open Settings on iOS 18.
  2. Select Apple Intelligence & Siri.
  3. Tap ChatGPT (or External Providers).
  4. Under permissions, ensure Confirm Before Sending is toggled on.

When enabled, iOS 18 will always prompt before transmitting any sensitive text, ensuring users retain complete control over what information leaves their device.