> ## 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.

# Modality

Restrict to models for a modality surface: `text` / `image_output` match output modality, `image` / `audio` match input modality, and `tool_calling` keeps only rows that recorded at least one tool call. Exact dataset — cannot be combined with `category` or `language_type`.

## Example Usage

```go theme={null}
import (
	"github.com/OpenRouterTeam/go-sdk/models/operations"
)

value := operations.ModalityText

// Open enum: custom values can be created with a direct type cast
custom := operations.Modality("custom_value")
```

## Values

| Name                  | Value         |
| --------------------- | ------------- |
| `ModalityText`        | text          |
| `ModalityImage`       | image         |
| `ModalityImageOutput` | image\_output |
| `ModalityAudio`       | audio         |
| `ModalityToolCalling` | tool\_calling |