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

# ![Cerebras 標誌](https://models.dev/logos/cerebras.svg)Cerebras

透過 Mastra 的模型路由器存取 3 個 Cerebras 模型。系統會自動使用 `CEREBRAS_API_KEY` 環境變數完成身分驗證。

如需進一步了解，請參閱[Cerebras 文件](https://inference-docs.cerebras.ai/models/overview)。

```bash
CEREBRAS_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: 'cerebras/gemma-4-31b',
})

// 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)
}
```

## 模型

| Model                   | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| ----------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `cerebras/gemma-4-31b`  | 131K    |       |           |       |       |       | $0.99      | $1          |
| `cerebras/gpt-oss-120b` | 131K    |       |           |       |       |       | $0.35      | $0.75       |
| `cerebras/zai-glm-4.7`  | 131K    |       |           |       |       |       | $2         | $3          |

## 進階設定

### 自訂標頭

```typescript
const agent = new Agent({
  id: 'custom-agent',
  name: 'custom-agent',
  model: {
    id: 'cerebras/gemma-4-31b',
    apiKey: process.env.CEREBRAS_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 ? 'cerebras/zai-glm-4.7' : 'cerebras/gemma-4-31b'
  },
})
```

## 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/cerebras)。

**npm**:

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

**pnpm**:

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

**Yarn**:

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

**Bun**:

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

如需此 Provider 的詳細說明，請參閱 [AI SDK Cerebras Provider 文件](https://ai-sdk.dev/providers/ai-sdk-providers/cerebras)。