---
id: pr-vllm-20453
repo: vllm-project/vllm
pr: 20453
title: Support Llama 4 for cutlass_moe_fp4
author: mgoin
date: '2025-07-09'
url: https://github.com/vllm-project/vllm/pull/20453
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: 31b96d1c643c5866dc080b57a71693de1b83cfc6
inclusion_reason: kernel file changes
changed_paths:
- vllm/model_executor/layers/fused_moe/cutlass_moe.py
- vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors_moe.py
- vllm/model_executor/layers/quantization/modelopt.py
head_ref_oid: bce2959dd938a362f460557021503b510148480e
artifact_dir: evidence/pull-bundles/vllm/gh-20453
---
# Support Llama 4 for cutlass_moe_fp4

- Repository: `vllm-project/vllm`
- PR: [20453](https://github.com/vllm-project/vllm/pull/20453)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/model_executor/layers/fused_moe/cutlass_moe.py`
- `vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors_moe.py`
- `vllm/model_executor/layers/quantization/modelopt.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-20453`
