# ![QiHang logo](https://models.dev/logos/qihang-ai.svg)QiHang

Access 9 QiHang models through Mastra's model router. Authentication is handled automatically using the `QIHANG_API_KEY` environment variable.

Learn more in the [QiHang documentation](https://www.qhaigc.net/docs).

```bash
QIHANG_API_KEY=your-api-key
```

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

const agent = new Agent({
  id: "my-agent",
  name: "My Agent",
  instructions: "You are a helpful assistant",
  model: "qihang-ai/claude-haiku-4-5-20251001"
});

// 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 [QiHang documentation](https://www.qhaigc.net/docs) for details.

## Models

| Model                                  | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| -------------------------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `qihang-ai/claude-haiku-4-5-20251001`  | 200K    |       |           |       |       |       | $0.14      | $0.71       |
| `qihang-ai/claude-opus-4-5-20251101`   | 200K    |       |           |       |       |       | $0.71      | $4          |
| `qihang-ai/claude-sonnet-4-5-20250929` | 200K    |       |           |       |       |       | $0.43      | $2          |
| `qihang-ai/gemini-2.5-flash`           | 1.0M    |       |           |       |       |       | $0.09      | $0.71       |
| `qihang-ai/gemini-3-flash-preview`     | 1.0M    |       |           |       |       |       | $0.07      | $0.43       |
| `qihang-ai/gemini-3-pro-preview`       | 1.0M    |       |           |       |       |       | $0.57      | $3          |
| `qihang-ai/gpt-5-mini`                 | 200K    |       |           |       |       |       | $0.04      | $0.29       |
| `qihang-ai/gpt-5.2`                    | 400K    |       |           |       |       |       | $0.25      | $2          |
| `qihang-ai/gpt-5.2-codex`              | 400K    |       |           |       |       |       | $0.14      | $1          |

## Advanced Configuration

### Custom Headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.qhaigc.net/v1",
    id: "qihang-ai/claude-haiku-4-5-20251001",
    apiKey: process.env.QIHANG_API_KEY,
    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
      ? "qihang-ai/gpt-5.2-codex"
      : "qihang-ai/claude-haiku-4-5-20251001";
  }
});
```