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

# ![Berget.AI logo](https://models.dev/logos/berget.svg)Berget.AI

Access 9 Berget.AI models through Mastra's model router. Authentication is handled automatically using the `BERGET_API_KEY` environment variable.

Learn more in the [Berget.AI documentation](https://api.berget.ai).

```bash
BERGET_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: "berget/google/gemma-4-31B-it"
});

// 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 [Berget.AI documentation](https://api.berget.ai) for details.

## Models

| Model                                                  | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| ------------------------------------------------------ | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `berget/google/gemma-4-31B-it`                         | 128K    |       |           |       |       |       | $0.28      | $0.55       |
| `berget/meta-llama/Llama-3.3-70B-Instruct`             | 128K    |       |           |       |       |       | $0.99      | $0.99       |
| `berget/mistralai/Mistral-Medium-3.5-128B`             | 262K    |       |           |       |       |       | $2         | $6          |
| `berget/mistralai/Mistral-Small-3.2-24B-Instruct-2506` | 32K     |       |           |       |       |       | $0.33      | $0.33       |
| `berget/moonshotai/Kimi-K2.6`                          | 262K    |       |           |       |       |       | $0.83      | $4          |
| `berget/moonshotai/Kimi-K3`                            | 328K    |       |           |       |       |       | $3         | $15         |
| `berget/openai/gpt-oss-120b`                           | 128K    |       |           |       |       |       | $0.22      | $0.83       |
| `berget/zai-org/GLM-4.7`                               | 128K    |       |           |       |       |       | $0.77      | $3          |
| `berget/zai-org/GLM-5.2`                               | 524K    |       |           |       |       |       | $2         | $5          |

## Advanced configuration

### Custom headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.berget.ai/v1",
    id: "berget/google/gemma-4-31B-it",
    apiKey: process.env.BERGET_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
      ? "berget/zai-org/GLM-5.2"
      : "berget/google/gemma-4-31B-it";
  }
});
```