The Xcode 26.4.0 GM image has been released and can be selected as follows:
macos:
xcode: 26.4.0

Xcode 26.4.0 Release Notes | Apple Developer Documentation
Apple Silicon VM Image Info ![]()
Xcode 26.4.0 Build version 17E192 is installed at /Applications/Xcode-26.4.app
The full manifest of installed software can be found here.
