FLUX 3 Image Klein: 5.6B open-weights image model runs on 8GB GPUs

Black Forest Labs released FLUX 3 Image Klein on October 15, 2026: a 5.6B-parameter open-weights image model with native 4K output, editing and multi-reference generation from up to 10 images. The INT8 build runs on Nvidia GPUs with as little as 8GB of VRAM, generating a 1MP image in about 4 seconds on an RTX 5090 and under 9 seconds on an RTX 4070.

• One model handles generation, editing and multi-reference input from up to 10 images
• INT8 build runs on GPUs with 8GB of VRAM
• API pricing: $0.008 at 768px to $0.036 at 4K, 5–17x cheaper than full FLUX 3
• Free commercial use under the FLUX Kommunity License for firms under $5M revenue