# ![Lilac logo](https://models.dev/logos/lilac.svg)Lilac

Access 4 Lilac models through Mastra's model router. Authentication is handled automatically using the `LILAC_API_KEY` environment variable.

Learn more in the [Lilac documentation](https://docs.getlilac.com).

```bash
LILAC_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: "lilac/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 [Lilac documentation](https://docs.getlilac.com) for details.

## Models

| Model                          | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| ------------------------------ | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `lilac/google/gemma-4-31b-it`  | 262K    |       |           |       |       |       | $0.11      | $0.35       |
| `lilac/minimaxai/minimax-m2.7` | 205K    |       |           |       |       |       | $0.30      | $1          |
| `lilac/moonshotai/kimi-k2.6`   | 262K    |       |           |       |       |       | $0.70      | $4          |
| `lilac/zai-org/glm-5.1`        | 203K    |       |           |       |       |       | $0.90      | $3          |

## Advanced configuration

### Custom headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.getlilac.com/v1",
    id: "lilac/google/gemma-4-31b-it",
    apiKey: process.env.LILAC_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
      ? "lilac/zai-org/glm-5.1"
      : "lilac/google/gemma-4-31b-it";
  }
});
```