> ## 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.

# StabilityUpscaleFastNode - ComfyUI Built-in Node Documentation

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

> This documentation was AI-generated. If you find any errors or have suggestions for improvement, please feel free to contribute! [Edit on GitHub](https://github.com/Comfy-Org/embedded-docs/blob/main/comfyui_embedded_docs/docs/StabilityUpscaleFastNode/en.md)

Quickly upscales an image via Stability API call to 4x its original size. This node is specifically intended for upscaling low-quality or compressed images by sending them to Stability AI's fast upscaling service.

## Inputs

| Parameter | Data Type | Required | Range | Description                    |
| --------- | --------- | -------- | ----- | ------------------------------ |
| `image`   | IMAGE     | Yes      | -     | The input image to be upscaled |

## Outputs

| Output Name | Data Type | Description                                           |
| ----------- | --------- | ----------------------------------------------------- |
| `output`    | IMAGE     | The upscaled image returned from the Stability AI API |