---
id: pr-vllm-21331
repo: vllm-project/vllm
pr: 21331
title: Support Tensorrt-LLM MoE fp4 for low-latency
author: wenscarl
date: '2025-08-08'
url: https://github.com/vllm-project/vllm/pull/21331
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- kernel-fusion
- moe
- nvfp4
- quantization
techniques:
- kernel-fusion
hardware_features:
- fp4
- nvfp4
kernel_types:
- moe
- quantization
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: a3b9c17b56d09a091e210222d8e1f75cabe65b84
inclusion_reason: kernel file changes
changed_paths:
- vllm/envs.py
- vllm/model_executor/layers/fused_moe/config.py
- vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors_moe.py
- vllm/model_executor/layers/quantization/modelopt.py
- vllm/model_executor/layers/quantization/utils/flashinfer_fp4_moe.py
- vllm/model_executor/layers/quantization/utils/nvfp4_moe_support.py
- vllm/utils/flashinfer.py
head_ref_oid: 7ff8b94faef2c385b054da38730a708467a0b38b
artifact_dir: evidence/pull-bundles/vllm/gh-21331
---
# Support Tensorrt-LLM MoE fp4 for low-latency

- Repository: `vllm-project/vllm`
- PR: [21331](https://github.com/vllm-project/vllm/pull/21331)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/envs.py`
- `vllm/model_executor/layers/fused_moe/config.py`
- `vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors_moe.py`
- `vllm/model_executor/layers/quantization/modelopt.py`
- `vllm/model_executor/layers/quantization/utils/flashinfer_fp4_moe.py`
- `vllm/model_executor/layers/quantization/utils/nvfp4_moe_support.py`
- `vllm/utils/flashinfer.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-21331`
