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

Access 8 STACKIT models through Mastra's model router. Authentication is handled automatically using the `STACKIT_API_KEY` environment variable.

Learn more in the [STACKIT documentation](https://docs.stackit.cloud/products/data-and-ai/ai-model-serving/basics/available-shared-models).

```bash
STACKIT_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: "stackit/Qwen/Qwen3-VL-235B-A22B-Instruct-FP8"
});

// 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 [STACKIT documentation](https://docs.stackit.cloud/products/data-and-ai/ai-model-serving/basics/available-shared-models) for details.

## Models

| Model                                                | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| ---------------------------------------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `stackit/cortecs/Llama-3.3-70B-Instruct-FP8-Dynamic` | 128K    |       |           |       |       |       | $0.49      | $0.71       |
| `stackit/google/gemma-3-27b-it`                      | 37K     |       |           |       |       |       | $0.49      | $0.71       |
| `stackit/intfloat/e5-mistral-7b-instruct`            | 4K      |       |           |       |       |       | $0.02      | $0.02       |
| `stackit/neuralmagic/Meta-Llama-3.1-8B-Instruct-FP8` | 128K    |       |           |       |       |       | $0.16      | $0.27       |
| `stackit/neuralmagic/Mistral-Nemo-Instruct-2407-FP8` | 128K    |       |           |       |       |       | $0.49      | $0.71       |
| `stackit/openai/gpt-oss-120b`                        | 131K    |       |           |       |       |       | $0.49      | $0.71       |
| `stackit/Qwen/Qwen3-VL-235B-A22B-Instruct-FP8`       | 218K    |       |           |       |       |       | $2         | $2          |
| `stackit/Qwen/Qwen3-VL-Embedding-8B`                 | 32K     |       |           |       |       |       | $0.09      | $0.09       |

## Advanced configuration

### Custom headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.openai-compat.model-serving.eu01.onstackit.cloud/v1",
    id: "stackit/Qwen/Qwen3-VL-235B-A22B-Instruct-FP8",
    apiKey: process.env.STACKIT_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
      ? "stackit/openai/gpt-oss-120b"
      : "stackit/Qwen/Qwen3-VL-235B-A22B-Instruct-FP8";
  }
});
```