# Z.AI Coding Plan Models

Access 5 Z.AI Coding Plan models through Mastra's model router. Authentication is handled automatically using the `ZHIPU_API_KEY` environment variable.

Learn more in the [Z.AI Coding Plan documentation](https://docs.z.ai/devpack/overview).

## Environment Variable

```bash
ZHIPU_API_KEY=your-api-key
```

## Sample Code

### Agent Implementation

```typescript
import { Agent } from "@mastra/core/agent";

const agent = new Agent({
  id: "my-agent",
  name: "My Agent",
  instructions: "You are a helpful assistant",
  model: "zai-coding-plan/glm-4.5-air"
});

// 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);
}
```

Mastra uses the OpenAI-compatible `/chat/completions` endpoint. Some provider-specific features may not be available. Check the [Z.AI Coding Plan documentation](https://docs.z.ai/devpack/overview) for details.

## Models

| Model                        | Context | Tools | Reasoning | Image | Audio | Video | Input $/1M | Output $/1M |
|------------------------------|---------|-------|-----------|-------|-------|-------|-------------|--------------|
| `zai-coding-plan/glm-4.5-air`  | 131K    |       |           |       |       |       | —           | —            |
| `zai-coding-plan/glm-4.7`      | 205K    |       |           |       |       |       | —           | —            |
| `zai-coding-plan/glm-5-turbo`   | 200K    |       |           |       |       |       | —           | —            |
| `zai-coding-plan/glm-5.1`      | 200K    |       |           |       |       |       | —           | —            |
| `zai-coding-plan/glm-5v-turbo`  | 200K    |       |           |       |       |       | —           | —            |

5 available models

## Advanced Configuration

### Custom Headers

```typescript
const agent = new Agent({
  id: "custom-agent",
  name: "custom-agent",
  model: {
    url: "https://api.z.ai/api/coding/paas/v4",
    id: "zai-coding-plan/glm-4.5-air",
    apiKey: process.env.ZHIPU_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
      ? "zai-coding-plan/glm-5v-turbo"
      : "zai-coding-plan/glm-4.5-air";
  }
});
```