HSWQ quantization outperforms native NVFP4 for image generation
Zestyclose_Bake3680 · reddit · 2026-08-19
The author released a Hybrid Sensitivity-Weighted Quantization (HSWQ) method and a ComfyUI loader. Using a ConvRot Int8 + ConvRot NVFP4 hybrid strategy, benchmarks on Z Image models show HSWQ significantly outperforms naive native NVFP4 casting in both MSE and SSIM metrics, reducing quantization loss.
Related event: Z Image Introduces HSWQ Hybrid Quantization for Lower VRAM Usage(2 posts)→
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