---
id: pr-vllm-27439
repo: vllm-project/vllm
pr: 27439
title: '[Bugfix] Use latency MOE backend as default for Flashinfer and other misc fixes'
author: pavanimajety
date: '2025-11-07'
url: https://github.com/vllm-project/vllm/pull/27439
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: 72b1c2ae2c2d2782ef1850ca1b96a21f797f7af6
inclusion_reason: defer
changed_paths:
- csrc/quantization/fp4/nvfp4_quant_kernels.cu
- tests/kernels/quantization/test_nvfp4_quant.py
- vllm/_custom_ops.py
- vllm/envs.py
- vllm/model_executor/layers/quantization/compressed_tensors/schemes/compressed_tensors_w4a4_nvfp4.py
- vllm/model_executor/layers/quantization/fp8.py
- vllm/model_executor/layers/quantization/modelopt.py
artifact_dir: evidence/pull-bundles/vllm/gh-27439
head_ref_oid: 903430c8fca935296d68ab2d6e1e7a0921a999ce
---
# [Bugfix] Use latency MOE backend as default for Flashinfer and other misc fixes

- Repository: `vllm-project/vllm`
- PR: [27439](https://github.com/vllm-project/vllm/pull/27439)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `csrc/quantization/fp4/nvfp4_quant_kernels.cu`
- `tests/kernels/quantization/test_nvfp4_quant.py`
- `vllm/_custom_ops.py`
- `vllm/envs.py`
- `vllm/model_executor/layers/quantization/compressed_tensors/schemes/compressed_tensors_w4a4_nvfp4.py`
- `vllm/model_executor/layers/quantization/fp8.py`
- `vllm/model_executor/layers/quantization/modelopt.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-27439`
