FLUX 3 Image Klein
Black Forest Labs releases FLUX 3 Image Klein, an open-weights model with 5.6 billion parameters for image generation and editing, supporting up to 10 reference images. The INT8 build runs on NVIDIA GPUs with as little as 8GB of VRAM.
What the article says
On 15 October 2026, Black Forest Labs introduced FLUX 3 Image Klein, the second open-weight model in the FLUX 3 family. This 5.6-billion-parameter model generates images from text, edits them and combines up to 10 reference images, with native 4K generation and bounding boxes that confine edits to an area.
Variants are released: a base model for fine-tuning, a low-latency distilled model, and FP8, INT8 and NVFP4 versions developed with NVIDIA. The INT8 version runs on GeForce RTX GPUs from 8 GB of VRAM. The API starts at $0.009 per image, and the license allows free commercial use below $5 million in annual revenue. Support is announced at launch in ComfyUI, Diffusers and other tools. The rankings and latencies come from BFL's internal evaluations, and measurement methods differ across the compared models.
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