<p>FLUX 3 Image Klein is a 5.6B open weights image model from Black Forest Labs. One model handles text-to-image, editing with up to 10 reference images, and layout control with bounding boxes, at resolutions up to 4K.</p><p><strong>Originally released by <a target="_blank" rel="ugc" href="https://bfl.ai/models/flux-3-image-klein">Black Forest Labs</a> on Hugging Face.</strong> All credit for the model goes to the Black Forest Labs team. Civitai hosts a mirror so creators can generate with it on-site and train against it. Head to the <a target="_blank" rel="ugc" href="https://huggingface.co/black-forest-labs/flux-3-image-klein">original repo</a> for the reference code and updates.</p><h3><strong>Two versions</strong></h3><ul><li><p><strong>Klein</strong> is the distilled model: 16 steps with no guidance, about 6x faster than Base. BFL recommends it for generation and editing.</p></li><li><p><strong>Klein Base</strong> is the undistilled model: 50 steps at CFG 3.5. BFL recommends it for fine-tuning, LoRA training and research. LoRAs trained on Base can also be used on Klein, with partial compatibility.</p></li></ul><h3><strong>Files</strong></h3><p>Each version carries the diffusion model in bf16, int8 and nvfp4, from BFL's <a target="_blank" rel="ugc" href="https://huggingface.co/black-forest-labs/flux-3-image-klein-comfy">ComfyUI release</a>. The int8 files run on an 8 GB GPU (RTX 3070 class), and nvfp4 needs a Blackwell GPU. The text encoder and VAE ship in the ComfyUI repo.</p><h3><strong>Generating on Civitai</strong></h3><p>Both versions are in the Civitai generator for text-to-image and editing, with up to 10 reference images. Klein runs at fixed settings. Klein Base exposes steps, CFG and a negative prompt. Bounding-box layout is not in the generator yet.</p><h3><strong>License</strong></h3><p>FLUX 3 Image Klein is released under the <a target="_blank" rel="ugc" href="https://huggingface.co/black-forest-labs/flux-3-image-klein/blob/55d9cc2b0d33255ccd4fe1c9724bc3754de0ae96/LICENSE.md">FLUX Kommunity License</a>. The model and anything derived from it, including LoRAs and fine-tunes, are for non-commercial use, and derivatives must be shared under the same license. Users and companies with under US$5M in annual revenue may use the images they generate commercially. Larger commercial use needs a license from <a target="_blank" rel="ugc" href="https://bfl.ai/licensing">Black Forest Labs</a>.</p><p><em>This FLUX Model is licensed by Black Forest Labs Inc. under the FLUX Kommunity License. Copyright Black Forest Labs Inc.</em></p><h3><strong>Links</strong></h3><ul><li><p><a target="_blank" rel="ugc" href="https://huggingface.co/black-forest-labs/flux-3-image-klein">FLUX 3 Image Klein</a></p></li><li><p><a target="_blank" rel="ugc" href="https://huggingface.co/black-forest-labs/flux-3-image-klein-base">FLUX 3 Image Klein Base</a></p></li><li><p><a target="_blank" rel="ugc" href="https://huggingface.co/black-forest-labs/flux-3-image-klein-comfy">ComfyUI files</a></p></li><li><p><a target="_blank" rel="ugc" href="https://bfl.ai/models/flux-3-image-klein">Black Forest Labs</a></p></li></ul>

Flux.3 Klein

flux3Klein_klein_txt_3299383.safetensors

flux3Klein_klein_nvfp4.safetensors

flux3Klein_klein_pruned_int8.safetensors

flux3Klein_klein_txt_3299287.safetensors

flux3Klein_klein_txt_bf16.safetensors

flux3Klein_klein_bf16.safetensors

flux2-vae.safetensors

Klein

Klein-Base

flux3Klein_kleinBase_txt_bf16.safetensors

flux3Klein_kleinBase_txt_3299228.safetensors

flux3Klein_kleinBase_txt_3299231.safetensors

flux3Klein_kleinBase_nvfp4.safetensors

flux3Klein_kleinBase_pruned_int8.safetensors

flux3Klein_kleinBase_bf16.safetensors

Files with SHA256: 32de113cbf8282b02cbff0794b637b9d6676da09314a1db5a30bcea9bf4ee01c