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

# Providers

> Use your own API key with OpenRouter, Gemini, OpenAI, Anthropic, and other translation providers.

anylang is bring-your-own-key. It loads `.env` from the project where you run the CLI and uses the provider configured in `anylang.config.json`.

## Recommended: OpenRouter

Use OpenRouter if you want one API key and the flexibility to choose from many models.

```json theme={null}
{
  "provider": {
    "name": "openrouter",
    "baseUrl": "https://openrouter.ai/api/v1",
    "model": "openai/gpt-4.1-mini"
  }
}
```

```env theme={null}
OPENROUTER_API_KEY=your-openrouter-key
```

<Tip>
  You can change `model` to any OpenRouter model id supported by your account.
</Tip>

## Provider keys

| Provider                 | `provider.name`     | `.env` key           |
| ------------------------ | ------------------- | -------------------- |
| Gemini                   | `gemini`            | `GEMINI_API_KEY`     |
| OpenAI                   | `openai`            | `OPENAI_API_KEY`     |
| Anthropic                | `anthropic`         | `ANTHROPIC_API_KEY`  |
| Cohere                   | `cohere`            | `COHERE_API_KEY`     |
| Mistral                  | `mistral`           | `MISTRAL_API_KEY`    |
| DeepSeek                 | `deepseek`          | `DEEPSEEK_API_KEY`   |
| Groq                     | `groq`              | `GROQ_API_KEY`       |
| OpenRouter               | `openrouter`        | `OPENROUTER_API_KEY` |
| Perplexity               | `perplexity`        | `PERPLEXITY_API_KEY` |
| xAI                      | `xai`               | `XAI_API_KEY`        |
| Together AI              | `together`          | `TOGETHER_API_KEY`   |
| Fireworks AI             | `fireworks`         | `FIREWORKS_API_KEY`  |
| Custom OpenAI-compatible | `openai-compatible` | `ANYLANG_API_KEY`    |

## Gemini

```json theme={null}
{
  "provider": {
    "name": "gemini",
    "model": "gemini-2.5-flash"
  }
}
```

```env theme={null}
GEMINI_API_KEY=your-provider-key
```

## Anthropic

```json theme={null}
{
  "provider": {
    "name": "anthropic",
    "model": "claude-3-5-haiku-latest"
  }
}
```

```env theme={null}
ANTHROPIC_API_KEY=your-provider-key
```

## OpenAI-compatible gateways

Use `openai-compatible` with a custom `baseUrl` and `model`.

```json theme={null}
{
  "provider": {
    "name": "openai-compatible",
    "baseUrl": "https://your-gateway.example.com/v1",
    "model": "your-model"
  }
}
```

```env theme={null}
ANYLANG_API_KEY=your-provider-key
```

<Warning>
  anylang does not include a hosted translation key, proxy requests, track usage, or store billing data.
</Warning>