Shader Model 6.0 introduced wave intrinsics and 64‑bit integer support. Later versions add progressively more advanced capabilities: 6.1 added barycentric semantics, 6.4 added support required for DirectX Raytracing, and 6.5 added features required for Direct Machine Learning (DirectML).
If you are compiling shaders using the new DXIL format, your development environment must include the , which provides the necessary headers and libraries to support Shader Model 6 features. Shader Model 6.0 Download Windows 10 64 Bit