ModelSave - ComfyUI Built-in Node Documentation

The ModelSave node saves a MODEL to your computer’s storage as a .safetensors checkpoint file.

The ModelSave node saves a MODEL to your computer’s storage as a .safetensors checkpoint file. It writes the file into ComfyUI’s output directory using the filename prefix you provide, and embeds workflow prompt information and model metadata into the saved file when available.

Inputs

Parameter	Description	Data Type	Required	Range
model	The model to be saved to disk	MODEL	Yes	-
filename_prefix	The filename and path prefix for the saved model file (default: “diffusion_models/ComfyUI”)	STRING	Yes	-
prompt	Workflow prompt information (automatically provided)	PROMPT	No	-
extra_pnginfo	Additional workflow metadata (automatically provided)	EXTRA_PNGINFO	No	-

Note: The saved filename is built from the filename_prefix value followed by a five-digit counter (for example, diffusion_models/ComfyUI_00001_.safetensors). If a file with the same prefix already exists, the counter is increased so the new file gets a unique name. When available, the workflow prompt, additional metadata, and model architecture information (for example Stable Diffusion XL, SDXL Refiner, Stable Video Diffusion, or Stable Diffusion 3) are embedded in the saved file. If metadata saving is disabled through ComfyUI’s command-line settings, the prompt and extra metadata are not written into the file.

Outputs

Output Name	Description	Data Type
None	This node does not return any output values	-

This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! Edit on GitHub

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