> Discover all available pages from the documentation index: https://mastra.zisheng.pro/zh-TW/llms.txt

# ![AI-ROUTER 標誌](https://models.dev/logos/ai-router.svg)AI-ROUTER

透過 Mastra 的模型路由器存取 5 個 AI-ROUTER 模型。系統會自動使用 `AI_ROUTER_API_KEY` 環境變數完成身分驗證。

如需進一步了解，請參閱[AI-ROUTER 文件](https://ai-router.dev/openai-compatible-api-gateway/)。

```bash
AI_ROUTER_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: 'ai-router/gpt-5.4',
})

// 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)
}
```

> **資訊:** Mastra 使用與 OpenAI 相容的 `/chat/completions` endpoint。部分 Provider 特有功能可能無法使用，詳情請參閱[AI-ROUTER 文件](https://ai-router.dev/openai-compatible-api-gateway/)。

## 模型

| Model                     | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| ------------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `ai-router/gpt-5.4`       | 1.1M    |       |           |       |       |       | $3         | $15         |
| `ai-router/gpt-5.5`       | 1.1M    |       |           |       |       |       | $5         | $30         |
| `ai-router/gpt-5.6-luna`  | 1.1M    |       |           |       |       |       | $1         | $6          |
| `ai-router/gpt-5.6-sol`   | 1.1M    |       |           |       |       |       | $5         | $30         |
| `ai-router/gpt-5.6-terra` | 1.1M    |       |           |       |       |       | $3         | $15         |

## 進階設定

### 自訂標頭

```typescript
const agent = new Agent({
  id: 'custom-agent',
  name: 'custom-agent',
  model: {
    url: 'https://api.ai-router.dev/v1',
    id: 'ai-router/gpt-5.4',
    apiKey: process.env.AI_ROUTER_API_KEY,
    headers: {
      'X-Custom-Header': 'value',
    },
  },
})
```

### 動態選擇模型

```typescript
const agent = new Agent({
  id: 'dynamic-agent',
  name: 'Dynamic Agent',
  model: ({ requestContext }) => {
    const useAdvanced = requestContext.task === 'complex'
    return useAdvanced ? 'ai-router/gpt-5.6-terra' : 'ai-router/gpt-5.4'
  },
})
```