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# ![DeepSeek 标志](https://models.dev/logos/deepseek.svg)DeepSeek

通过 Mastra 的模型路由器访问 4 个 DeepSeek 模型。系统会自动使用 `DEEPSEEK_API_KEY` 环境变量完成身份验证。

更多信息请参阅[DeepSeek 文档](https://api-docs.deepseek.com/quick_start/pricing)。

```bash
DEEPSEEK_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: 'deepseek/deepseek-chat',
})

// 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 |
| ---------------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `deepseek/deepseek-chat`     | 1.0M    |       |           |       |       |       | $0.14      | $0.28       |
| `deepseek/deepseek-reasoner` | 1.0M    |       |           |       |       |       | $0.14      | $0.28       |
| `deepseek/deepseek-v4-flash` | 1.0M    |       |           |       |       |       | $0.14      | $0.28       |
| `deepseek/deepseek-v4-pro`   | 1.0M    |       |           |       |       |       | $0.43      | $0.87       |

## 高级配置

### 自定义请求头

```typescript
const agent = new Agent({
  id: 'custom-agent',
  name: 'custom-agent',
  model: {
    url: 'https://api.deepseek.com',
    id: 'deepseek/deepseek-chat',
    apiKey: process.env.DEEPSEEK_API_KEY,
    headers: {
      'X-Custom-Header': 'value',
    },
  },
})
```

### 动态选择模型

```typescript
const agent = new Agent({
  id: 'dynamic-agent',
  name: 'Dynamic Agent',
  model: ({ requestContext }) => {
    const useAdvanced = requestContext.task === 'complex'
    return useAdvanced ? 'deepseek/deepseek-v4-pro' : 'deepseek/deepseek-chat'
  },
})
```

## Provider 选项

DeepSeek 通过 `providerOptions` 参数支持以下 Provider 特有选项：

```typescript
const response = await agent.generate('Hello!', {
  providerOptions: {
    deepseek: {
      // See available options in the table below
    },
  },
})
```

### 可用选项

**thinking** (`{ type?: "adaptive" | "enabled" | "disabled" | undefined; } | undefined`)

**reasoningEffort** (`"low" | "medium" | "high" | "xhigh" | "max" | undefined`)

**strictJsonSchema** (`boolean | undefined`)