BFL released FLUX 3 Image Klein (POST /v1/flux-3-image-klein) on 2026-10-15. It takes the same prompt, references, resolution and aspect ratio as Flux 3 Image, so the node subclasses Flux3Image and adds what Klein accepts on top: seed, steps, output_format, exact width x height and a 0-7 safety_tolerance, without grounding. The Flux 3 Image example workflow gets two bypassed Klein groups (text to image, edit by URL); existing groups are untouched.