NVIDIA/cutlass v4.4.2

CUTLASS 4.4.2

Repository: NVIDIA/cutlass

Tag: v4.4.2

Published: 2026-03-17T14:55:49Z

Prerelease: no

Release notes:

CuTe DSL

• New features
• CuTe DSL now supports Python 3.14 for both x86_64 and aarch64
• Runtime Pointer/Tensor/FakeTensor now supports __cache_key__, providing a stable, hashable representation that simplifies and improves compiled function caching.
• Bug fixing and improvements
• Fixed Hopper FMHA causal attention performance regression on CUDA toolkit 13.1 by

optimizing mbarrier synchronization to avoid unnecessary convergence barriers.

• Fix kernel loading race condition when multiple GPU are present in the same process in JAX.

CUTLASS C++

• Enable Blackwell SM120f compilation of examples and exposes NVFP4/MX Grouped GEMM in the CUTLASS Profiler.