> ## Documentation Index
> Fetch the complete documentation index at: https://docs.comfy.org/llms.txt
> Use this file to discover all available pages before exploring further.

# CheckpointSave - ComfyUI Built-in Node Documentation

> Complete documentation for the CheckpointSave node in ComfyUI. Learn its inputs, outputs, parameters and usage.

The `Save Checkpoint` node is designed to save a complete Stable Diffusion model (including UNet, CLIP, and VAE components) as a **.safetensors** format checkpoint file.

The Save Checkpoint is primarily used in model merging workflows. After creating a new merged model through nodes like `ModelMergeSimple`, `ModelMergeBlocks`, etc., you can use this node to save the result as a reusable checkpoint file.

## Inputs

| Parameter         | Data Type | Description                                                                                                                                                                   |
| ----------------- | --------- | ----------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `model`           | MODEL     | The model parameter represents the primary model whose state is to be saved. It is essential for capturing the current state of the model for future restoration or analysis. |
| `clip`            | CLIP      | The clip parameter is intended for the CLIP model associated with the primary model, allowing its state to be saved alongside the main model.                                 |
| `vae`             | VAE       | The vae parameter is for the Variational Autoencoder (VAE) model, enabling its state to be saved for future use or analysis alongside the main model and CLIP.                |
| `filename_prefix` | STRING    | This parameter specifies the prefix for the filename under which the checkpoint will be saved.                                                                                |

Additionally, the node has two hidden inputs for metadata:

**prompt (PROMPT)**: Workflow prompt information
**extra\_pnginfo (EXTRA\_PNGINFO)**: Additional PNG information

## Outputs

This node will output a checkpoint file, and the corresponding output file path is `output/checkpoints/` directory

## Architecture Compatibility

* Currently fully supported: SDXL, SD3, SVD and other mainstream architectures, see [source code](https://github.com/comfyanonymous/ComfyUI/blob/master/comfy_extras/nodes_model_merging.py#L176-L189)
* Basic support: Other architectures can be saved but without standardized metadata information

## Related Links

Related source code: [nodes\_model\_merging.py#L227](https://github.com/comfyanonymous/ComfyUI/blob/master/comfy_extras/nodes_model_merging.py#L227)