Xcode 13.3 Beta 1 was released on 27 Jan 2022 and requires macOS 12.0+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/Xcode_13.3_beta/Xcode_13.3_beta.xip.
Release notes are located at https://developer.apple.com/documentation/xcode-release-notes/xcode-13_3-release-notes.
The SDKs it contains are:
- iOS 15.4 (Build 19E5209h)
- macOS 12.3 (Build 21E5196i)
- tvOS 15.4 (Build 19L5409i)
- watchOS 8.5 (Build 19T5212h)
The compilers it contains are:
- clang 13.1.6 (Build 1316.0.19.2)
- swift 5.6 (Build 5.6.0.320.8)