Flux 3 Image Klein: open weights, 5.6B parameters

Flux has released FLUX 3 Image Klein, a 5.6B parameter open-weights model for text-to-image generation and image editing that outperforms larger open-source models and some closed competitors despite having significantly fewer parameters. The model supports native 4K generation, pixel-perfect editing, and multi-reference image generation, and is optimized to run on consumer GPUs with as little as 8GB of VRAM. The release includes multiple optimized builds (FP8, INT8, NVFP4) and a step-distilled version for faster generation, enabling practical local deployment and on-device editing capabilities.