> ## 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.

# Region

Filter to models with endpoints in the given data region ("eu" or "us").

## Example Usage

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

value := operations.RegionEu

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

## Values

| Name       | Value |
| ---------- | ----- |
| `RegionEu` | eu    |
| `RegionUs` | us    |