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

Access 7 Tinfoil models through Mastra's model router. Authentication is handled automatically using the `TINFOIL_API_KEY` environment variable.

Learn more in the [Tinfoil documentation](https://docs.tinfoil.sh).

```bash
TINFOIL_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: "tinfoil/gemma4-31b"
});

// 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 [Tinfoil documentation](https://docs.tinfoil.sh) for details.

## Models

| Model                            | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| -------------------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `tinfoil/gemma4-31b`             | 256K    |       |           |       |       |       | $0.40      | $1          |
| `tinfoil/glm-5-2`                | 384K    |       |           |       |       |       | $2         | $5          |
| `tinfoil/gpt-oss-120b`           | 131K    |       |           |       |       |       | $0.15      | $0.60       |
| `tinfoil/gpt-oss-safeguard-120b` | 131K    |       |           |       |       |       | $0.15      | $0.60       |
| `tinfoil/kimi-k2-6`              | 256K    |       |           |       |       |       | $2         | $5          |
| `tinfoil/llama3-3-70b`           | 128K    |       |           |       |       |       | $2         | $3          |
| `tinfoil/nomic-embed-text`       | 8K      |       |           |       |       |       | $0.05      | —           |

## Advanced configuration

### Custom headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://inference.tinfoil.sh/v1",
    id: "tinfoil/gemma4-31b",
    apiKey: process.env.TINFOIL_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
      ? "tinfoil/nomic-embed-text"
      : "tinfoil/gemma4-31b";
  }
});
```