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

# OpenRouter

> Configure OpenRouter as an LLM provider for translation generation.

## Provider value

Use `openrouter` in `llm.profiles.<name>.provider`.

## Model IDs

`model` is passed through to OpenRouter unchanged, for example `openai/gpt-5`,
`anthropic/claude-opus-5`, or `google/gemini-2.5-flash-lite`. Hyperlocalise does
not maintain its own catalogue of OpenRouter models; any model ID your
OpenRouter account can access will work.

## Example profile

```json theme={null}
{
  "llm": {
    "profiles": {
      "default": {
        "provider": "openrouter",
        "model": "google/gemini-2.5-flash-lite",
        "prompt": "Translate from {{source}} to {{target}}:\n\n{{input}}"
      }
    }
  }
}
```

## Required environment variable

<CodeGroup>
  ```bash Export theme={null}
  export OPENROUTER_API_KEY="your-openrouter-api-key"
  ```

  ```bash .env.local theme={null}
  OPENROUTER_API_KEY="your-openrouter-api-key"
  ```
</CodeGroup>

## Optional environment variable

`OPENROUTER_BASE_URL` defaults to `https://openrouter.ai/api/v1`.

## Attribution headers

OpenRouter supports optional `HTTP-Referer` and `X-OpenRouter-Title` request
headers (`X-Title` is accepted as an alias for the latter) to attribute usage
to your app on OpenRouter's leaderboards. Hyperlocalise does not set these
today; there is no per-provider custom-header configuration yet.