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

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

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

Learn more in the [Arcee documentation](https://docs.arcee.ai).

```bash
ARCEE_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: "arcee/deepseek/deepseek-v4-flash-latest"
});

// 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);
}
```

> **Note:** Mastra uses the OpenAI-compatible `/chat/completions` endpoint. Some provider-specific features may not be available. Check the [Arcee documentation](https://docs.arcee.ai) for details.

## Models

| Model                                     | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
| ----------------------------------------- | ------- | ----- | --------- | ----- | ----- | ----- | ---------- | ----------- |
| `arcee/deepseek/deepseek-v4-flash-latest` | 1.0M    |       |           |       |       |       | $0.14      | $0.28       |
| `arcee/deepseek/deepseek-v4-pro`          | 512K    |       |           |       |       |       | $2         | $3          |
| `arcee/deepseek/deepseek-v4-pro-0813`     | 1.0M    |       |           |       |       |       | $1         | $4          |
| `arcee/moonshotai/kimi-k3`                | 1.0M    |       |           |       |       |       | $3         | $15         |
| `arcee/thinkingmachines/inkling-small`    | 262K    |       |           |       |       |       | $0.50      | $1          |
| `arcee/trinity-large-thinking`            | 262K    |       |           |       |       |       | $0.25      | $0.80       |
| `arcee/zai-org/glm-5.2`                   | 262K    |       |           |       |       |       | $1         | $4          |

## Advanced configuration

### Custom headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.arcee.ai/api/v1",
    id: "arcee/deepseek/deepseek-v4-flash-latest",
    apiKey: process.env.ARCEE_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
      ? "arcee/zai-org/glm-5.2"
      : "arcee/deepseek/deepseek-v4-flash-latest";
  }
});
```