> ## 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.

# OpenRouterLLMNode - ComfyUI Built-in Node Documentation

> Complete documentation for the OpenRouterLLMNode 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/OpenRouterLLMNode/en.md)

## Overview

The OpenRouter LLM node sends a text prompt to a curated set of popular language models available through the OpenRouter service and returns the generated text response. It supports models from providers like xAI, DeepSeek, Qwen, Mistral, Z.AI (GLM), Moonshot (Kimi), and Perplexity Sonar, and can optionally include images or videos in the request.

## Inputs

| Parameter       | Data Type | Required | Range                                       | Description                                                                              |
| --------------- | --------- | -------- | ------------------------------------------- | ---------------------------------------------------------------------------------------- |
| `prompt`        | STRING    | Yes      | N/A                                         | Text input to the model.                                                                 |
| `model`         | STRING    | Yes      | Multiple options available (see note below) | The OpenRouter model used to generate the response.                                      |
| `seed`          | INT       | Yes      | 0 to 2147483647                             | Seed for sampling. Set to 0 to omit. Most models treat this as a hint only. (default: 0) |
| `system_prompt` | STRING    | No       | N/A                                         | Foundational instructions that dictate the model's behavior. (default: "")               |

**Note on `model` parameter:** The available model options are dynamically built and may include models with different capabilities. Some models support additional features like reasoning effort, web search, or image/video inputs. The node will validate that the number of images or videos provided does not exceed the model's maximum supported count.

**Note on `seed` parameter:** The `seed` parameter has a "control\_after\_generate" behavior, meaning it can be set to automatically change (e.g., randomize, increment, or fixed) after each node execution, depending on the user's widget settings.

**Note on `system_prompt`:** This parameter is optional and is marked as an advanced parameter in the user interface.

## Outputs

| Output Name | Data Type | Description                                            |
| ----------- | --------- | ------------------------------------------------------ |
| `output`    | STRING    | The generated text response from the OpenRouter model. |

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