# ![AgentRouter logo](https://models.dev/logos/agentrouter.svg)AgentRouter

Access 20 AgentRouter models through Mastra's model router. Authentication is handled automatically using the `AGENTROUTER_API_KEY` environment variable.

Learn more in the [AgentRouter documentation](https://docs.agentrouter.org).

```bash
AGENTROUTER_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: "agentrouter/claude-3-5-haiku-20241022"
});

// 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 [AgentRouter documentation](https://docs.agentrouter.org) for details.

## Models

| Model                                             | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| ------------------------------------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `agentrouter/claude-3-5-haiku-20241022`           | 200K    |       |           |       |       |       | $1         | $5          |
| `agentrouter/claude-3-5-sonnet-20240620`          | 200K    |       |           |       |       |       | $3         | $15         |
| `agentrouter/claude-3-5-sonnet-20241022`          | 200K    |       |           |       |       |       | $3         | $15         |
| `agentrouter/claude-3-7-sonnet-20250219`          | 200K    |       |           |       |       |       | $3         | $15         |
| `agentrouter/claude-3-7-sonnet-20250219-thinking` | 200K    |       |           |       |       |       | $3         | $15         |
| `agentrouter/claude-haiku-4-5-20251001`           | 200K    |       |           |       |       |       | $2         | $4          |
| `agentrouter/claude-opus-4-20250514`              | 200K    |       |           |       |       |       | $21        | $105        |
| `agentrouter/claude-opus-4-20250514-thinking`     | 200K    |       |           |       |       |       | $2         | $10         |
| `agentrouter/claude-sonnet-4-20250514`            | 200K    |       |           |       |       |       | $3         | $15         |
| `agentrouter/claude-sonnet-4-20250514-thinking`   | 200K    |       |           |       |       |       | $2         | $10         |
| `agentrouter/claude-sonnet-4-5-20250929`          | 1.0M    |       |           |       |       |       | $6         | $30         |
| `agentrouter/deepseek-r1-0528`                    | 128K    |       |           |       |       |       | $0.30      | $0.04       |
| `agentrouter/deepseek-v3.1`                       | 128K    |       |           |       |       |       | $0.30      | $0.04       |
| `agentrouter/deepseek-v3.2`                       | 128K    |       |           |       |       |       | $0.30      | $0.04       |
| `agentrouter/gemini-3-pro-preview`                | 1.0M    |       |           |       |       |       | $2         | $8          |
| `agentrouter/glm-4.5`                             | 131K    |       |           |       |       |       | $0.00      | —           |
| `agentrouter/glm-4.6`                             | 205K    |       |           |       |       |       | $0.00      | —           |
| `agentrouter/gpt-5`                               | 1.3M    |       |           |       |       |       | —          | —           |
| `agentrouter/gpt-5.1`                             | 400K    |       |           |       |       |       | $2         | $2          |
| `agentrouter/kimi-k2-thinking`                    | 262K    |       |           |       |       |       | $0.00      | —           |

## Advanced Configuration

### Custom Headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://agentrouter.org/v1",
    id: "agentrouter/claude-3-5-haiku-20241022",
    apiKey: process.env.AGENTROUTER_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
      ? "agentrouter/kimi-k2-thinking"
      : "agentrouter/claude-3-5-haiku-20241022";
  }
});
```