Apple today released the first beta versions of iOS 18.3 and iPadOS 18.3 to developers for testing purposes. The software was launched a week after Apple released iOS 18.2 and iPadOS 18.2.

Users can download iOS 18.3 and iPadOS 18.3 by going to General > Software Update in the Settings app on compatible devices.
There's no word yet on what's included in iOS 18.3 and iPadOS 18.3, but Apple is still working on introducing Apple smart features. iOS 18.2 and iPadOS 18.2 include Image Playground, Genmoji, and Siri ChatGPT integration, but there are still new Siri features scheduled for release next year.
While iOS 18.3 and iPadOS 18.3 testing will begin in December, these updates may be released sometime at the end of January.