IT之家 · 智能时代 · 10/21/2026, 18:39:12
Black Forest Labs Releases FLUX 3 Klein: A 5.6B Image Model for 8GB VRAM
Black Forest Labs has open-sourced FLUX 3 Image Klein, a 5.6B parameter image generation model optimized for consumer GPUs. The INT8 version runs on NVIDIA RTX cards with just 8GB VRAM, offering native 4K support and pixel-level editing capabilities while balancing speed and quality.
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On October 21, it was reported that the visual AI lab Black Forest Labs released the FLUX 3 Image Klein image generation model on the 15th of this month (local time) with open weights.
FLUX 3 Image Klein features 5.6 billion parameters and is optimized for consumer-grade GPUs. Its BF16 weights require 12.2GB of memory, while FP8 weights require 5.6GB. The INT8 version of this model can run on NVIDIA GeForce RTX GPUs equipped with only 8GB of VRAM via ComfyUI or Diffusers.
According to tests, the streamlined INT8 version takes approximately 4 seconds to generate a 1MP image on a GeForce RTX 5090, and less than 9 seconds to generate a 1MP image via ComfyUI on a GeForce RTX 4070.
FLUX 3 Image Klein supports text-to-image generation, image editing, and multi-reference generation. It natively supports 4K resolution, enabling pixel-level precise editing and stable pattern constraint performance. Black Forest Labs claims that it outperforms larger open-source models in multiple scenarios, offering a better balance between speed and quality.
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