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

Access 9 submodel models through Mastra's model router. Authentication is handled automatically using the `SUBMODEL_INSTAGEN_ACCESS_KEY` environment variable.

Learn more in the [submodel documentation](https://submodel.gitbook.io).

```bash
SUBMODEL_INSTAGEN_ACCESS_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: "submodel/Qwen/Qwen3-235B-A22B-Instruct-2507"
});

// 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 [submodel documentation](https://submodel.gitbook.io) for details.

## Models

| Model                                              | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| -------------------------------------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `submodel/deepseek-ai/DeepSeek-R1-0528`            | 75K     |       |           |       |       |       | $0.50      | $2          |
| `submodel/deepseek-ai/DeepSeek-V3-0324`            | 75K     |       |           |       |       |       | $0.20      | $0.80       |
| `submodel/deepseek-ai/DeepSeek-V3.1`               | 75K     |       |           |       |       |       | $0.20      | $0.80       |
| `submodel/openai/gpt-oss-120b`                     | 131K    |       |           |       |       |       | $0.10      | $0.50       |
| `submodel/Qwen/Qwen3-235B-A22B-Instruct-2507`      | 262K    |       |           |       |       |       | $0.20      | $0.30       |
| `submodel/Qwen/Qwen3-235B-A22B-Thinking-2507`      | 262K    |       |           |       |       |       | $0.20      | $0.60       |
| `submodel/Qwen/Qwen3-Coder-480B-A35B-Instruct-FP8` | 262K    |       |           |       |       |       | $0.20      | $0.80       |
| `submodel/zai-org/GLM-4.5-Air`                     | 131K    |       |           |       |       |       | $0.10      | $0.50       |
| `submodel/zai-org/GLM-4.5-FP8`                     | 131K    |       |           |       |       |       | $0.20      | $0.80       |

## Advanced configuration

### Custom headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://llm.submodel.ai/v1",
    id: "submodel/Qwen/Qwen3-235B-A22B-Instruct-2507",
    apiKey: process.env.SUBMODEL_INSTAGEN_ACCESS_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
      ? "submodel/zai-org/GLM-4.5-FP8"
      : "submodel/Qwen/Qwen3-235B-A22B-Instruct-2507";
  }
});
```