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

# Models overview

> Every AI model available on the canvas, grouped by category.

Melius routes generations through frontier text, image, and video models. The list updates frequently — use [`model_list`](/mcp/tools#models) (MCP) for the live set.

## Categories

| Category     | Used on     | Purpose                                          |
| ------------ | ----------- | ------------------------------------------------ |
| `text`       | Text nodes  | Language model output.                           |
| `image`      | Image nodes | Image generation.                                |
| `video`      | Video nodes | Video generation.                                |
| `audio`      | Audio nodes | Audio generation — speech, music, sound effects. |
| `image-tool` | Image nodes | Image-to-image transforms and edits.             |
| `video-tool` | Video nodes | Video-to-video transforms.                       |

## Defaults

When you create a node without specifying a model, Melius picks a sensible default for that node type. Call [`model_defaults`](/mcp/tools#models) to see the current defaults.

## Picking a model

Each node has a model selector. Filter by category, then pick the variant. The selector also shows which settings (aspect ratio, resolution, duration) the model supports — unsupported settings are hidden.

## Deprecation

Models are occasionally deprecated when a provider replaces them with a newer version. Existing nodes pointing at a deprecated model continue to work for a grace period — Melius surfaces an in-app warning when this happens and recommends a successor. After the grace period, the deprecated model is removed and re-runs use the recommended successor.