Apple's redesigned Siri in iOS 27 and macOS 27 "Golden Gate" now lets you pick which AI model handles your toughest questions, fundamentally changing how the assistant competes with ChatGPT. Rather than forcing users to choose between Apple's privacy-focused on-device AI and more powerful external models, the new Extensions system allows you to set ChatGPT, Google Gemini, or Anthropic's Claude as your default provider for complex reasoning tasks while keeping Siri in control of your device.

For years, the Siri versus ChatGPT debate had a clear answer: Siri handled device control and voice commands, while ChatGPT won on reasoning, writing, and creative work. The 2026 redesign narrows that gap by introducing a hybrid approach. Siri now runs many tasks on-device and through Apple's Private Cloud Compute, which the company says keeps your data inaccessible to Apple or third parties. When Siri encounters a question beyond its capabilities, it can now route the request to your chosen external AI model instead of struggling through a weak answer.

What Changed in Siri's 2026 Redesign?

Apple rebuilt Siri from the ground up for iOS 27 and macOS 27. The assistant now includes a dedicated app where you can start new conversations or revisit past ones, plus a chat interface that behaves far more like ChatGPT or Claude than the old command-and-response Siri. On iPhone, Siri lives in the Dynamic Island as an expandable bubble, while on Mac it appears as a standalone app you can open like any other program. The next generation of Apple Foundation Models powering Siri were developed using technologies behind Google's Gemini models, the result of a collaboration between the two companies.

The core selling point remains privacy. Because many requests never leave your device, and sensitive cloud requests run through Private Cloud Compute, Siri remains the safer choice for anything personal. This is the one area where Siri has always beaten ChatGPT, and the 2026 redesign only widens that lead.

How to Set Up Your Preferred AI Provider in Apple Intelligence?

• Open Settings: Launch Settings on your iPhone, iPad, or Mac running iOS 27, iPadOS 27, or macOS 27.
• Navigate to Apple Intelligence: Tap "Apple Intelligence & Siri," then select "Extensions" to view available AI providers.
• Choose Your Provider: Select your default AI provider from the available options, such as ChatGPT, Gemini, or Claude.
• Sign In and Confirm: Sign in to your chosen service if you want access to your paid plan and conversation history, then confirm your selection.

Three providers are expected at launch: OpenAI's ChatGPT, Google's Gemini, and Anthropic's Claude. This setup means you no longer have to pick a side. Siri stays in charge of your device, and your chosen chatbot handles the heavy reasoning behind Writing Tools, Image Playground, and complex Siri questions.

Where Does Each Assistant Excel?

Siri's whole identity is the assistant that lives inside your devices. It is not trying to write your novel; it is trying to run your day without you touching the screen. Siri is the only assistant that can actually control your phone and Mac. It sets alarms and reminders, sends messages, makes calls, opens apps, adjusts settings, and controls smart home devices, all hands-free. Its biggest edge is Personal Context, meaning it can draw on your emails, messages, photos, and files to answer questions that a standalone chatbot has no access to.

ChatGPT wins on intelligence. It is far stronger at reasoning, long-form writing, coding, and generating images or documents that Siri simply cannot produce. The moment Siri steps outside quick tasks, it struggles. Reviewers testing Siri AI on macOS "Golden Gate" found it can produce short answers but cannot generate a document or PDF, and it stumbles the instant your request leaves the Apple ecosystem. It is not built for long-form creative work, deep research, or coding, and it still leans on a partner chatbot for anything genuinely hard.

The pattern is clear: anything that touches your device, your calendar, or your privacy leans toward Siri, and anything that needs real intelligence leans toward ChatGPT. This is exactly why so many people end up using both.

Why Does Apple's New Approach Matter?

This is the change almost no other comparison mentions, and it reshapes the whole Siri versus ChatGPT question. Rather than locking you into one partner, the Extensions system lets you choose which AI provider powers Apple Intelligence. This is the closest Apple has come to admitting that no single assistant does everything. It also raises an obvious follow-up: if you can plug any model into Siri, why stop at one? For many users, the smart setup runs both. Keep Siri for hands-free tasks on your device, and use ChatGPT for thinking work, or run every model in one app.

Apple's first public beta went live in July 2026, with a wide release to everyone this fall. The redesign signals a shift in how Apple views AI competition. Rather than trying to build a single all-purpose assistant, the company is positioning itself as the platform layer that connects you to the best tool for each job. Siri becomes the orchestrator of your digital life, while external models handle the heavy cognitive lifting.