---
id: pr-vllm-24440
repo: vllm-project/vllm
pr: 24440
title: '[Transform] [Quantization] Add QuTLASS support to vLLM'
author: LopezCastroRoberto
date: '2025-10-10'
url: https://github.com/vllm-project/vllm/pull/24440
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- nvfp4
- pipeline-stages
- quantization
techniques:
- pipeline-stages
hardware_features:
- fp4
- nvfp4
kernel_types:
- quantization
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 96ad65b7fe515663da8ede09a1aa7f74aa500c97
inclusion_reason: kernel file changes
changed_paths:
- .buildkite/test-pipeline.yaml
- CMakeLists.txt
- benchmarks/kernels/bench_mxfp4_qutlass.py
- benchmarks/kernels/bench_nvfp4_qutlass.py
- cmake/external_projects/qutlass.cmake
- tests/kernels/quantization/test_mxfp4_qutlass.py
- tests/kernels/quantization/test_nvfp4_qutlass.py
- tests/quantization/fp_quant.py
- vllm/_custom_ops.py
- vllm/model_executor/layers/quantization/__init__.py
- vllm/model_executor/layers/quantization/fp_quant.py
- vllm/model_executor/layers/quantization/qutlass_utils.py
head_ref_oid: df2ee30d74519c03390c72296a863702592bb76a
artifact_dir: evidence/pull-bundles/vllm/gh-24440
---
# [Transform] [Quantization] Add QuTLASS support to vLLM

- Repository: `vllm-project/vllm`
- PR: [24440](https://github.com/vllm-project/vllm/pull/24440)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `.buildkite/test-pipeline.yaml`
- `CMakeLists.txt`
- `benchmarks/kernels/bench_mxfp4_qutlass.py`
- `benchmarks/kernels/bench_nvfp4_qutlass.py`
- `cmake/external_projects/qutlass.cmake`
- `tests/kernels/quantization/test_mxfp4_qutlass.py`
- `tests/kernels/quantization/test_nvfp4_qutlass.py`
- `tests/quantization/fp_quant.py`
- `vllm/_custom_ops.py`
- `vllm/model_executor/layers/quantization/__init__.py`
- `vllm/model_executor/layers/quantization/fp_quant.py`
- `vllm/model_executor/layers/quantization/qutlass_utils.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-24440`
