Black Forest Labs' open-weights image model FLUX 3 Image Klein runs on consumer GPUs with just 8 GB of VRAM
Black Forest Labs released FLUX 3 Image Klein, a 5.6B open image model that runs on 8 GB GPUs.
Black Forest Labs released FLUX 3 Image Klein, a 5.6-billion-parameter open-weights model for text-to-image generation, image editing, and generation with up to ten reference images. It supports native 4K output, pixel-accurate editing, and bounding boxes, and BFL says internal Elo tests rank it above other open models, Ideogram V4.5, and its own FLUX.2 [pro]. It gains 91 Elo over FLUX.2 [klein] with 38 percent fewer parameters than that 9-billion-parameter model. An INT8 build runs on NVIDIA GPUs with 8 GB of VRAM and generates an image in under nine seconds on an RTX 4070; weights use the FLUX Kommunity License, with API access at $0.009 per 1,000 images.
- 5.6B open-weights model for generation and editing.
- Supports native 4K, ten references, and bounding boxes.
- INT8 build runs on 8 GB VRAM; under nine seconds on an RTX 4070.
- Commercial use is free below $5 million annual revenue.
- API pricing is $0.009 per 1,000 images.
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Oct 15, 2026
Black Forest Labs has released FLUX 3 Image Klein, a 5.6-billion-parameter open-weights model for text-to-image generation, image editing, and generation with up to ten reference images. It supports native 4K output, pixel-accurate editing, and bounding boxes for element placement. Black Forest Labs says it scores the highest Elo ratings among all open models in internal testing, beating closed competitors Ideogram V4.5 and even BFL's own FLUX.2 [pro]. It gains 91 Elo points over FLUX.2 [klein] with 38 percent fewer parameters than that model's 9 billion.
An INT8 build lets it run on NVIDIA GPUs with just 8 GB of VRAM, generating an image in under 9 seconds on an RTX 4070. The weights ship under the FLUX Kommunity License, free for commercial use by companies making under $5 million annually. The model is also available through the BFL API at $0.009 per 1,000 images, as a Playground, on Hugging Face Spaces, and locally via ComfyUI and Diffusers. LoRA training works from day one through Ostris AI Toolkit and NVIDIA NeMo AutoModel.
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