---
id: pr-vllm-20640
repo: vllm-project/vllm
pr: 20640
title: '[feat] enable SM100 CUTLASS block scaled group gemm for smaller batch sizes'
author: djmmoss
date: '2025-07-09'
url: https://github.com/vllm-project/vllm/pull/20640
source_category: upstream-code
architectures:
- sm100
tags:
- gemm
- kernel-fusion
- moe
techniques:
- kernel-fusion
hardware_features: []
kernel_types:
- gemm
- moe
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 97abeb1daac6007526af435244d3f7047db272cd
inclusion_reason: kernel file changes
changed_paths:
- vllm/model_executor/layers/fused_moe/cutlass_moe.py
- vllm/model_executor/layers/fused_moe/fused_moe.py
head_ref_oid: 9930e09fc489a55abafcd6b040ca00d0601e3ebe
artifact_dir: evidence/pull-bundles/vllm/gh-20640
---
# [feat] enable SM100 CUTLASS block scaled group gemm for smaller batch sizes

- Repository: `vllm-project/vllm`
- PR: [20640](https://github.com/vllm-project/vllm/pull/20640)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/model_executor/layers/fused_moe/cutlass_moe.py`
- `vllm/model_executor/layers/fused_moe/fused_moe.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-20640`
