| --- |
| base_model: |
| - black-forest-labs/FLUX.2-dev |
| pipeline_tag: text-to-image |
| license: other |
| tags: |
| - quantized |
| - mxfp4 |
| - autoround |
| - diffusion |
| - text-to-image |
| - autoquant-agent |
| --- |
| |
| # FLUX.2-dev-MXFP4-RTN-AutoRound |
|
|
| ## Model Details |
|
|
| This is a **MXFP4** (4-bit micro-scaling) quantization of [black-forest-labs/FLUX.2-dev](https://huggingface.co/black-forest-labs/FLUX.2-dev), a flagship text-to-image diffusion model. Generated by [AutoRound](https://github.com/intel/auto-round) with RTN (round-to-nearest, iters=0). |
|
|
| - **Base model:** [black-forest-labs/FLUX.2-dev](https://huggingface.co/black-forest-labs/FLUX.2-dev) |
| - **Quantization:** MXFP4 (W4A4), group_size=32 |
| - **Method:** AutoRound RTN |
| - **Model size:** ~62 GB (vs ~110 GB bf16) |
| |
| ## Quantization Details |
| |
| - **Scheme:** MXFP4 (data_type=mx_fp, bits=4, act_bits=4) |
| - **Group size:** 32 |
| - **Export format:** auto_round (vllm-omni compatible) |
| - **Calibration:** coco2014, 28 steps, guidance 3.5 |
| |
| ## Evaluation |
| |
| Evaluated with vllm-omni diffusion harness (28 steps, guidance 3.5, 1024×1024, seed 42). |
| |
| | Benchmark | BF16 Baseline | MXFP4 Quantized | |
| |---|---|---| |
| | DrawBench CLIP | 32.48 | 32.44 | |
| | DrawBench CLIP-IQA | 71.35 | 71.01 | |
| | DrawBench ImageReward | 1.15 | 1.11 | |
| | GenEval | 0.844 | 0.835 | |
| |
| MXFP4 quantization is nearly lossless vs the BF16 baseline (GenEval 0.835 vs 0.844, CLIP 32.44 vs 32.48). |
| |
| ## Usage |
| |
| ```python |
| from vllm_omni.entrypoints.omni import Omni |
| from vllm_omni.inputs.data import OmniDiffusionSamplingParams |
| |
| omni = Omni(model="INCModel3/FLUX.2-dev-MXFP4-RTN-AutoRound", mode="text-to-image") |
| params = OmniDiffusionSamplingParams( |
| height=1024, width=1024, seed=42, |
| guidance_scale=3.5, num_inference_steps=28, num_outputs_per_prompt=1, |
| ) |
| out = omni.generate("a red bench in a park", sampling_params_list=[params]) |
| ``` |
| |
| ## License |
| |
| Please follow the license of the original model [black-forest-labs/FLUX.2-dev](https://huggingface.co/black-forest-labs/FLUX.2-dev). |
| |
| _Produced with [autoquant-agent](https://github.com/) — agent-driven quantize + evaluate + self-heal._ |
|
|
