---
language:
- en
library_name: sglang
base_model: black-forest-labs/FLUX.1-dev
tags:
- sglang
- diffusion
- modelopt
- nvfp4
- transformer
---

# flux1-dev-modelopt-nvfp4-sglang-transformer

This repository contains the SGLang-native ModelOpt NVFP4 transformer override for `black-forest-labs/FLUX.1-dev`.

It is intended to be used with SGLang Diffusion through `--transformer-path` while keeping the base model separate:

```bash
sglang generate \
  --model-path black-forest-labs/FLUX.1-dev \
  --transformer-path lmsys/flux1-dev-modelopt-nvfp4-sglang-transformer \
  --prompt "A cinematic scene with detailed lighting" \
  --save-output
```

## Contents

The repository is intentionally minimal and contains only:

- `config.json`
- `*.safetensors` weight shard files
- `*.safetensors.index.json` when the checkpoint is sharded

Validation images, benchmark outputs, profiler traces, and conversion scratch artifacts are not stored in this model repository.

## Notes

- Quantization config is stored in `config.json` with `quant_method=modelopt` and `quant_algo=NVFP4`.
- Use this checkpoint with an SGLang version that includes diffusion ModelOpt support for the corresponding model family.
- The original base model license and usage terms still apply.