---
id: pr-sglang-17309
repo: sgl-project/sglang
pr: 17309
title: '[Refactor] Set `fp4-gemm-backend=auto` on SM100 and rename `fp4-gemm-backend` with `flashinfer_` prefix'
author: b8zhong
date: '2026-01-19'
url: https://github.com/sgl-project/sglang/pull/17309
source_category: upstream-code
architectures:
- sm100
tags: []
techniques: []
hardware_features: []
kernel_types: []
languages: []
captured_at: '2026-05-16'
status: merged
merge_sha: f374623fa9f6156d24b18dd5a7397a61c9e57e53
inclusion_reason: defer
changed_paths:
- docs/advanced_features/server_arguments.md
- docs/references/environment_variables.md
- python/sglang/srt/layers/quantization/compressed_tensors/schemes/compressed_tensors_w4a4_nvfp4.py
- python/sglang/srt/layers/quantization/fp4_utils.py
- python/sglang/srt/layers/quantization/modelopt_quant.py
- python/sglang/srt/server_args.py
- test/srt/test_nvfp4_gemm.py
artifact_dir: evidence/pull-bundles/sglang/gh-17309
head_ref_oid: bb1cbf8914d18353d34c90026c06c09d7b866b9e
---
# [Refactor] Set `fp4-gemm-backend=auto` on SM100 and rename `fp4-gemm-backend` with `flashinfer_` prefix

- Repository: `sgl-project/sglang`
- PR: [17309](https://github.com/sgl-project/sglang/pull/17309)
- Decision: `defer`
- Reason: defer

## Changed Paths

- `docs/advanced_features/server_arguments.md`
- `docs/references/environment_variables.md`
- `python/sglang/srt/layers/quantization/compressed_tensors/schemes/compressed_tensors_w4a4_nvfp4.py`
- `python/sglang/srt/layers/quantization/fp4_utils.py`
- `python/sglang/srt/layers/quantization/modelopt_quant.py`
- `python/sglang/srt/server_args.py`
- `test/srt/test_nvfp4_gemm.py`

## Evidence Bundle

`evidence/pull-bundles/sglang/gh-17309`
