---
id: pr-vllm-23008
repo: vllm-project/vllm
pr: 23008
title: 'Use Blackwell FlashInfer MXFP4 MoE by default if available '
author: mgoin
date: '2025-08-18'
url: https://github.com/vllm-project/vllm/pull/23008
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- kernel-fusion
- moe
- quantization
techniques:
- kernel-fusion
hardware_features:
- fp4
kernel_types:
- moe
- quantization
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 6d25e3fd6ea9562b8d73ecf0a527ce3da23261b2
inclusion_reason: kernel file changes
changed_paths:
- vllm/model_executor/layers/fused_moe/layer.py
- vllm/model_executor/layers/quantization/mxfp4.py
head_ref_oid: d29cd371e301e5df522a83b20bff1039148d043b
artifact_dir: evidence/pull-bundles/vllm/gh-23008
---
# Use Blackwell FlashInfer MXFP4 MoE by default if available 

- Repository: `vllm-project/vllm`
- PR: [23008](https://github.com/vllm-project/vllm/pull/23008)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/model_executor/layers/fused_moe/layer.py`
- `vllm/model_executor/layers/quantization/mxfp4.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-23008`
