BFL: FLUX 3 Image Klein needs prompt upsampling; system prompt now open-sourced

bfl_ai · x · 2026-10-24

BFL says FLUX 3 Image Klein should always be used with their prompt upsampling for best results; a recommended system prompt is available in the repo for other workflows. Weights are on Hugging Face (5.6B/9B variants incl. base/comfy/pup), supporting text-to-image, editing, and bounding boxes.

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