CUTLASS

by NVIDIA

High-performance CUDA matrix kernels used by Whisper engines.

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TL;DR

Best for custom Whisper / Conformer kernels with sparsity or FP8. Pricing: free.

Category
Open source
License
NOASSERTION
Stars
★ 10.2k
Last push
2026-08-06
Pricing
free
Platforms
Linux

What it is

NVIDIA's open template library for high-performance GEMM. BSD-3-Clause.

Best for: Custom Whisper / Conformer kernels with sparsity or FP8.
Watch out for: C++/CUDA expertise required.

Install / use

git clone https://github.com/NVIDIA/cutlass

Features

Speaker diarizationNo
Word-level timestampsYes
Streaming / real-timeNo
Languages supported99
HIPAA eligibleNo

Links

GitHub repo ↗

CUTLASS vs Whipscribe

FeatureCUTLASSWhipscribe
CategoryOpen sourceTranscription APIs
Pricingfree$4–$24 one-time packs (credits never expire) · $2 single unlock · 60 min free on signup
Speaker diarizationNoYes
Word timestampsYesYes
StreamingNoNo
Languages9999
PlatformsLinuxWeb, API, MCP

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