---
id: pr-vllm-19879
repo: vllm-project/vllm
pr: 19879
title: '[Quantization] Add compressed-tensors emulations support for NVFP4'
author: dsikka
date: '2025-06-25'
url: https://github.com/vllm-project/vllm/pull/19879
source_category: upstream-code
architectures:
- sm100
tags:
- fp4
- nvfp4
- quantization
techniques: []
hardware_features:
- fp4
- nvfp4
kernel_types:
- quantization
languages:
- python
captured_at: '2026-04-27'
status: merged
merge_sha: 02c97d9a92edca6f8675923afe0f1cf657305e38
inclusion_reason: kernel file changes
changed_paths:
- vllm/envs.py
- vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors.py
- vllm/model_executor/layers/quantization/compressed_tensors/schemes/compressed_tensors_w4a4_nvfp4.py
head_ref_oid: d6018a74d866a6681fc025309345d63385378aac
artifact_dir: evidence/pull-bundles/vllm/gh-19879
---
# [Quantization] Add compressed-tensors emulations support for NVFP4

- Repository: `vllm-project/vllm`
- PR: [19879](https://github.com/vllm-project/vllm/pull/19879)
- Decision: `kernel file changes`
- Reason: kernel file changes

## Changed Paths

- `vllm/envs.py`
- `vllm/model_executor/layers/quantization/compressed_tensors/compressed_tensors.py`
- `vllm/model_executor/layers/quantization/compressed_tensors/schemes/compressed_tensors_w4a4_nvfp4.py`

## Evidence Bundle

`evidence/pull-bundles/vllm/gh-19879`
