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

# Arena

Design Arena only: arena to query. Defaults to `models` when source is `design-arena`.

## Example Usage

```python theme={null}
from openrouter.operations import Arena

# Open enum: unrecognized values are captured as UnrecognizedStr
value: Arena = "models"
```

## Values

This is an open enum. Unrecognized values will not fail type checks.

* `"models"`
* `"builders"`
* `"agents"`