> Discover all available pages from the documentation index: https://mastra.ai/llms.txt

# ![Thinking Machines logo](https://models.dev/logos/thinkingmachines.svg)Thinking Machines

Access 2 Thinking Machines models through Mastra's model router. Authentication is handled automatically using the `TINKER_API_KEY` environment variable.

Learn more in the [Thinking Machines documentation](https://tinker-docs.thinkingmachines.ai/tinker/compatible-apis/anthropic/).

```bash
TINKER_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: "thinkingmachines/thinkingmachines/Inkling"
});

// 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 [Thinking Machines documentation](https://tinker-docs.thinkingmachines.ai/tinker/compatible-apis/anthropic/) for details.

## Models

| Model                                                   | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| ------------------------------------------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `thinkingmachines/thinkingmachines/Inkling`             | 66K     |       |           |       |       |       | $2         | $5          |
| `thinkingmachines/thinkingmachines/Inkling:peft:262144` | 262K    |       |           |       |       |       | $4         | $9          |

## Advanced configuration

### Custom headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://tinker.thinkingmachines.dev/services/tinker-prod/anthropic/api/v1",
    id: "thinkingmachines/thinkingmachines/Inkling",
    apiKey: process.env.TINKER_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
      ? "thinkingmachines/thinkingmachines/Inkling:peft:262144"
      : "thinkingmachines/thinkingmachines/Inkling";
  }
});
```

## Direct provider installation

This provider can also be installed directly as a standalone package, which can be used instead of the Mastra model router string. View the [package documentation](https://www.npmjs.com/package/@ai-sdk/anthropic) for more details.

**npm**:

```bash
npm install @ai-sdk/anthropic
```

**pnpm**:

```bash
pnpm add @ai-sdk/anthropic
```

**Yarn**:

```bash
yarn add @ai-sdk/anthropic
```

**Bun**:

```bash
bun add @ai-sdk/anthropic
```