Xcode 13.0 Beta 3 was released on 16 Jul 2021 and requires macOS 11.3+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/Xcode_13_beta_3/Xcode_13_beta3.xip.
Release notes are located at https://developer.apple.com/documentation/xcode-release-notes/xcode-13-beta-release-notes.
The SDKs it contains are:
- iOS 15.0 (Build 19A5297f)
- macOS 12.0 (Build 21A5284e)
- tvOS 15.0 (Build 19J5304f)
- watchOS 8.0 (Build 19R5302g)
The compilers it contains are:
- clang 13.0.0 (Build 1300.0.25.3)
- swift 5.5 (Build 1300.0.24.13)