---
id: pr-vllm-20037
repo: vllm-project/vllm
pr: 20037
title: '[Core] FlashInfer CUTLASS fused MoE backend (NVFP4)'
author: wenscarl
date: '2025-07-18'
url: https://github.com/vllm-project/vllm/pull/20037
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: c7d8724e7865ba4a54ffdba23ac77eb13d28234b
inclusion_reason: defer
changed_paths:
- vllm/_custom_ops.py
- vllm/envs.py
- vllm/model_executor/layers/fused_moe/batched_deep_gemm_moe.py
- vllm/model_executor/layers/fused_moe/batched_triton_or_deep_gemm_moe.py
- vllm/model_executor/layers/fused_moe/config.py
- vllm/model_executor/layers/fused_moe/cutlass_moe.py
- vllm/model_executor/layers/fused_moe/deep_gemm_moe.py
- vllm/model_executor/layers/fused_moe/deepep_ht_prepare_finalize.py
- vllm/model_executor/layers/fused_moe/deepep_ll_prepare_finalize.py
- 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/fused_moe/fused_batched_moe.py
- vllm/model_executor/layers/fused_moe/fused_moe.py
- vllm/model_executor/layers/fused_moe/layer.py
- vllm/model_executor/layers/fused_moe/modular_kernel.py
- vllm/model_executor/layers/fused_moe/pplx_prepare_finalize.py
- vllm/model_executor/layers/fused_moe/prepare_finalize.py
- vllm/model_executor/layers/fused_moe/triton_deep_gemm_moe.py
- vllm/model_executor/layers/fused_moe/utils.py
- vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors_moe.py
- vllm/model_executor/layers/quantization/modelopt.py
- vllm/utils/flashinfer.py
artifact_dir: evidence/pull-bundles/vllm/gh-20037
head_ref_oid: cc0e87d81926d35470b57cadd89775f7eb15aa04
---
# [Core] FlashInfer CUTLASS fused MoE backend (NVFP4)

- Repository: `vllm-project/vllm`
- PR: [20037](https://github.com/vllm-project/vllm/pull/20037)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `vllm/_custom_ops.py`
- `vllm/envs.py`
- `vllm/model_executor/layers/fused_moe/batched_deep_gemm_moe.py`
- `vllm/model_executor/layers/fused_moe/batched_triton_or_deep_gemm_moe.py`
- `vllm/model_executor/layers/fused_moe/config.py`
- `vllm/model_executor/layers/fused_moe/cutlass_moe.py`
- `vllm/model_executor/layers/fused_moe/deep_gemm_moe.py`
- `vllm/model_executor/layers/fused_moe/deepep_ht_prepare_finalize.py`
- `vllm/model_executor/layers/fused_moe/deepep_ll_prepare_finalize.py`
- `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/fused_moe/fused_batched_moe.py`
- `vllm/model_executor/layers/fused_moe/fused_moe.py`
- `vllm/model_executor/layers/fused_moe/layer.py`
- `vllm/model_executor/layers/fused_moe/modular_kernel.py`
- `vllm/model_executor/layers/fused_moe/pplx_prepare_finalize.py`
- `vllm/model_executor/layers/fused_moe/prepare_finalize.py`
- `vllm/model_executor/layers/fused_moe/triton_deep_gemm_moe.py`
- `vllm/model_executor/layers/fused_moe/utils.py`
- `vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors_moe.py`
- `vllm/model_executor/layers/quantization/modelopt.py`
- `vllm/utils/flashinfer.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-20037`
