# ![Bailing logo](https://models.dev/logos/bailing.svg)Bailing

Access 2 Bailing models through Mastra's model router. Authentication is handled automatically using the `BAILING_API_TOKEN` environment variable.

Learn more in the [Bailing documentation](https://alipaytbox.yuque.com/sxs0ba/ling/intro).

```bash
BAILING_API_TOKEN=your-api-token
```

```typescript
import { Agent } from "@mastra/core/agent";

const agent = new Agent({
  id: "my-agent",
  name: "My Agent",
  instructions: "You are a helpful assistant",
  model: "bailing/Ling-1T"
});

// Generate a response
const response = await agent.generate("Hello!");

// Stream a response
const stream = await agent.stream("Tell me a story");
for await (const chunk of stream) {
  console.log(chunk);
}
```

> **Info:** Mastra uses the OpenAI-compatible `/chat/completions` endpoint. Some provider-specific features may not be available. Check the [Bailing documentation](https://alipaytbox.yuque.com/sxs0ba/ling/intro) for details.

## Models

| Model             | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| ----------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `bailing/Ling-1T` | 128K    |       |           |       |       |       | $0.57      | $2          |
| `bailing/Ring-1T` | 128K    |       |           |       |       |       | $0.57      | $2          |

## Advanced configuration

### Custom headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.tbox.cn/api/llm/v1/chat/completions",
    id: "bailing/Ling-1T",
    apiKey: process.env.BAILING_API_TOKEN,
    headers: {
      "X-Custom-Header": "value"
    }
  }
});
```

### Dynamic model selection

```typescript
const agent = new Agent({
  id: "dynamic-agent",
  name: "Dynamic Agent",
  model: ({ requestContext }) => {
    const useAdvanced = requestContext.task === "complex";
    return useAdvanced
      ? "bailing/Ring-1T"
      : "bailing/Ling-1T";
  }
});
```