# FLUX 3 Image Klein: open weights, 5.6B parameters

The 5.6B parameter model supports native 4K text-to-image generation, image editing, and multi-reference generation using up to 10 reference images.

- Released as base and step-distilled weights under the FLUX Kommunity License, allowing free commercial use for organizations under $5M in annual revenue.
- INT8 and FP8 builds run on consumer GPUs with 8GB of VRAM, generating 1MP images in under 9 seconds on an RTX 4070 via ComfyUI.
- API access starts at $0.009 per 1K image, with prompt upsampling and pixel restoration features.
- Supports LoRA training on day one through Hugging Face Diffusers, Ostris's AI Toolkit, and NVIDIA NeMo AutoModel.

## Why it matters

Developers and creators can run native 4K generation and image editing locally on consumer GPUs with as little as 8GB of VRAM.

## Sources

- [Black Forest Labs: FLUX 3 Image Klein: open weights, 5.6B parameters](https://bfl.ai/blog/flux-3-image-klein)

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Summarized by dstilled on 2026-10-15. https://dstilled.ai/story/12d48358-1afd-44a6-9cab-68d4de949bdd