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Built an NVFP4 version of the LTX-2.5 Gemma-4 12B text encoder for ComfyUI.

This story is from 2026-08-21. It is preserved in the archive; the latest stories are on the live feed.

I quantized the heavy Gemma decoder linear layers to Comfy-native NVFP4 while keeping embeddings, norms, vision components, and LTX-specific projection layers at their original precision. Result: lower VRAM usage works as a drop-in replacement for the LTX-2.5 Gemma text encoder no obvious quality d…

Read the full story at r/comfyui ↗

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  1. 2026-08-21 18:22 · r/comfyui
    Built an NVFP4 version of the LTX-2.5 Gemma-4 12B text encoder for ComfyUI.

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