---
id: pr-vllm-22511
repo: vllm-project/vllm
pr: 22511
title: Fix Llama4 FlashInfer FP4 MoE issues
author: nvpohanh
date: '2025-08-12'
url: https://github.com/vllm-project/vllm/pull/22511
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: 67c153b88a2129c3b6fb78af09901738f1034a68
inclusion_reason: kernel file changes
changed_paths:
- vllm/model_executor/layers/fused_moe/flashinfer_cutlass_moe.py
- vllm/model_executor/layers/fused_moe/flashinfer_cutlass_prepare_finalize.py
- vllm/model_executor/layers/quantization/modelopt.py
head_ref_oid: 194bc87d1d118b073d7b03ef26e82b8d47819dc3
artifact_dir: evidence/pull-bundles/vllm/gh-22511
---
# Fix Llama4 FlashInfer FP4 MoE issues

- Repository: `vllm-project/vllm`
- PR: [22511](https://github.com/vllm-project/vllm/pull/22511)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

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

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-22511`
