---
id: pr-vllm-25503
repo: vllm-project/vllm
pr: 25503
title: 'feat: BF16 FlashInfer Fused Cutlass MOE for Hopper and Blackwell Expert Parallel'
author: djmmoss
date: '2025-09-24'
url: https://github.com/vllm-project/vllm/pull/25503
source_category: upstream-code
architectures:
- sm100
- sm90
tags:
- kernel-fusion
- moe
techniques:
- kernel-fusion
hardware_features: []
kernel_types:
- moe
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 6160ba4151084c78164a0f472ce4da04067f9705
inclusion_reason: kernel file changes
changed_paths:
- vllm/envs.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/layer.py
- vllm/model_executor/layers/fused_moe/modular_kernel.py
head_ref_oid: 97cf9de3e974c58a0bfa5d0328bc071503739e60
artifact_dir: evidence/pull-bundles/vllm/gh-25503
---
# feat: BF16 FlashInfer Fused Cutlass MOE for Hopper and Blackwell Expert Parallel

- Repository: `vllm-project/vllm`
- PR: [25503](https://github.com/vllm-project/vllm/pull/25503)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/envs.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/layer.py`
- `vllm/model_executor/layers/fused_moe/modular_kernel.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-25503`
