Xcode 5.0.1 Release was released on 22 Oct 2013 and requires macOS 10.8+.
It can be downloaded from https://download.developer.apple.com/Developer_Tools/xcode_5.0.1/xcode_5.0.1.dmg.
Release notes are located at https://developer.apple.com/library/content/releasenotes/DeveloperTools/RN-Xcode/Chapters/Introduction.html#//apple_ref/doc/uid/TP40001051-CH1-SW544.
The compilers it contains are:
- clang 5.0 (Build 500.2.79)
- LLVM-GCC 3.3 (Build )