Apple is working behind the scenes to add new Apple Intelligence features to iOS 18, iPadOS 18, and macOS 15. We will see the first batch of features in the iOS 18.1, iPadOS 18.1, and macOS 15.1 updates, but Apple is also preparing for the next set of features. MacRumors has discovered new references to ChatGPT integration for Siri, as Apple is getting ready to implement ChatGPT support.