Xcode 13.0 Beta 1 was released on 7 Jun 2021 and requires macOS 11.3+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/Xcode_13_beta/Xcode_13_beta.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 19A5261u)
- macOS 12.0 (Build 21A5248o)
- tvOS 15.0 (Build 19J5268q)
- watchOS 8.0 (Build 19R5266p)
The compilers it contains are:
- clang 13.0.0 (Build 1300.0.18.6)
- swift 5.5 (Build 1300.0.19.104)