Fortunately, it's super easy to turn off, but it goes to show that Apple Intelligence is here to stay in the walled garden.

Step 1: Update your iPhone to iOS 18.3. Software updates are located in Settings beneath your Apple account. iOS 18.3 is expected within the next few days. Step 2: Navigate to Settings. Step 3: Select "Apple Intelligence & Siri." Step 4: Toggle off "Apple Intelligence."

iOS 18.3 doesn't add any significant new features to Apple Intelligence—instead, it tweaks what's already there. Whereas Apple Intelligence was opt-in in previous OS versions, it is now on by default in iOS 18.3 on supported devices.