Black Forest Labs Releases FLUX 3 Image Klein, an Open-Weight Model Running on 8GB GPUs

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Black Forest Labs released FLUX 3 Image Klein on October 15, 2026, a 5.6-billion-parameter open-weight image model supporting native 4K output. A single set of weights handles text-to-image generation, image editing, and multi-reference generation using up to 10 source images, along with bounding-box layout control. The INT8 build runs on NVIDIA RTX cards with as little as 8GB of VRAM, and the hosted API prices images at a fraction of the cost of the full FLUX 3 Image model. Weights are available under the FLUX Kommunity License, which permits free commercial use for businesses under $5 million in annual revenue, while early testers report weaknesses in people and pose generation, multi-reference compositing, and fine text rendering.

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