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

# ![FreeModel 標誌](https://models.dev/logos/freemodel.svg)FreeModel

透過 Mastra 的模型路由器存取 10 個 FreeModel 模型。系統會自動使用 `FREEMODEL_API_KEY` 環境變數完成身分驗證。

如需進一步了解，請參閱[FreeModel 文件](https://freemodel.dev)。

```bash
FREEMODEL_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: 'freemodel/claude-fable-5',
})

// 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[FreeModel 文件](https://freemodel.dev)。

## 模型

| Model                                 | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| ------------------------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `freemodel/claude-fable-5`            | 1.0M    |       |           |       |       |       | $10        | $50         |
| `freemodel/claude-haiku-4-5-20251001` | 200K    |       |           |       |       |       | $1         | $5          |
| `freemodel/claude-opus-4-6`           | 1.0M    |       |           |       |       |       | $5         | $25         |
| `freemodel/claude-opus-4-7`           | 1.0M    |       |           |       |       |       | $5         | $25         |
| `freemodel/claude-opus-4-8`           | 1.0M    |       |           |       |       |       | $5         | $25         |
| `freemodel/claude-sonnet-4-6`         | 1.0M    |       |           |       |       |       | $3         | $15         |
| `freemodel/gpt-5.3-codex`             | 400K    |       |           |       |       |       | $2         | $14         |
| `freemodel/gpt-5.4`                   | 1.1M    |       |           |       |       |       | $3         | $15         |
| `freemodel/gpt-5.4-mini`              | 400K    |       |           |       |       |       | $0.75      | $5          |
| `freemodel/gpt-5.5`                   | 1.1M    |       |           |       |       |       | $5         | $30         |

## 進階設定

### 自訂標頭

```typescript
const agent = new Agent({
  id: 'custom-agent',
  name: 'custom-agent',
  model: {
    url: 'https://cc.freemodel.dev/v1',
    id: 'freemodel/claude-fable-5',
    apiKey: process.env.FREEMODEL_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 ? 'freemodel/gpt-5.5' : 'freemodel/claude-fable-5'
  },
})
```

## 直接安裝 Provider

你也可以直接將此 Provider 安裝為獨立套件，用它取代 Mastra 模型路由字串。詳情請參閱[套件文件](https://www.npmjs.com/package/@ai-sdk/anthropic)。

**npm**:

```bash
npm install @ai-sdk/anthropic
```

**pnpm**:

```bash
pnpm add @ai-sdk/anthropic
```

**Yarn**:

```bash
yarn add @ai-sdk/anthropic
```

**Bun**:

```bash
bun add @ai-sdk/anthropic
```