---
id: pr-vllm-31742
repo: vllm-project/vllm
pr: 31742
title: '[Bugfix] Fix Broken ModelOpt NVFP4 MoE'
author: robertgshaw2-redhat
date: '2026-01-05'
url: https://github.com/vllm-project/vllm/pull/31742
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- fp8
- kernel-fusion
- moe
- nvfp4
- quantization
techniques:
- kernel-fusion
hardware_features:
- fp4
- fp8
- nvfp4
kernel_types:
- moe
- quantization
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: f6c0009afa366e4238cb118882415cd6c448c16b
inclusion_reason: kernel file changes
changed_paths:
- vllm/model_executor/layers/fused_moe/all2all_utils.py
- vllm/model_executor/layers/fused_moe/flashinfer_cutlass_moe.py
- vllm/model_executor/layers/quantization/fp8.py
- vllm/model_executor/layers/quantization/modelopt.py
head_ref_oid: c1870c79cd2836c4aaa10145b65e43d80f23e8ce
artifact_dir: evidence/pull-bundles/vllm/gh-31742
---
# [Bugfix] Fix Broken ModelOpt NVFP4 MoE

- Repository: `vllm-project/vllm`
- PR: [31742](https://github.com/vllm-project/vllm/pull/31742)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/model_executor/layers/fused_moe/all2all_utils.py`
- `vllm/model_executor/layers/fused_moe/flashinfer_cutlass_moe.py`
- `vllm/model_executor/layers/quantization/fp8.py`
- `vllm/model_executor/layers/quantization/modelopt.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-31742`
