# ![Morph logo](https://models.dev/logos/morph.svg)Morph

Access 3 Morph models through Mastra's model router. Authentication is handled automatically using the `MORPH_API_KEY` environment variable.

Learn more in the [Morph documentation](https://docs.morphllm.com).

```bash
MORPH_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: "morph/auto"
});

// 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 [Morph documentation](https://docs.morphllm.com) for details.

## Models

| Model                  | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| ---------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `morph/auto`           | 32K     |       |           |       |       |       | $0.85      | $2          |
| `morph/morph-v3-fast`  | 16K     |       |           |       |       |       | $0.80      | $1          |
| `morph/morph-v3-large` | 32K     |       |           |       |       |       | $0.90      | $2          |

## Advanced Configuration

### Custom Headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.morphllm.com/v1",
    id: "morph/auto",
    apiKey: process.env.MORPH_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
      ? "morph/morph-v3-large"
      : "morph/auto";
  }
});
```