Black Forest Labs FLUX.3 Image Klein lands in Diffusers with bounding-box layout control

Black Forest Labs released FLUX.3 Image Klein with same-day Diffusers support. One model handles text-to-image, multi-reference image generation and bounding-box layout control. Normalized bounding boxes set where generated regions go and where reference-image content moves, so layout instructions hold across different image sizes.

Why it matters: FLUX.3 lets you place generated regions and reference-image content with normalized bounding boxes that stay consistent across image sizes.