Convert-to-Quant (ctq) is installed for normal quantizations. For GGUF quantizations, try: hf_to_nvfp4_quant gguf_to_nvfp4_quant safetensors_to_nvfp4_quant hf_to_nvfp4_safetensors Depending on the source material. hf cli command is also installed, eg you can: hf download coder3101/gemma-4-12B-it-heretic --local-dir gemma-4-12B-it-heretic hf_to_nvfp4_gguf -o gemma-4-12B-it-heretic_nvfp4 gemma-4-12B-it-heretic The same directory can be quantized to one ComfyUI NVFP4 safetensors file: hf_to_nvfp4_safetensors -o gemma-4-12B-it-heretic-NVFP4.safetensors gemma-4-12B-it-heretic This would create a NVFP4 GGUF for Ollama/llama.cpp from https://huggingface.co/coder3101/gemma-4-12B-it-heretic