Z.AI Coding Plan

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.

ZHIPU_API_KEY=your-api-key

import { Agent } from "@mastra/core";

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

// 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 Z.AI Coding Plan documentation for details.

Models

5 available models

Model	Context	Tools	Reasoning	Image	Audio	Video	Input $/1M	Output $/1M
zai-coding-plan/glm-4.5	131K						—	—
zai-coding-plan/glm-4.5-air	131K						—	—
zai-coding-plan/glm-4.5-flash	131K						—	—
zai-coding-plan/glm-4.5v	64K						—	—
zai-coding-plan/glm-4.6	205K						—	—

Advanced Configuration

Custom Headers

const agent = new Agent({
  name: "custom-agent",
  model: {
    url: "https://api.z.ai/api/coding/paas/v4",
    id: "zai-coding-plan/glm-4.5",
    apiKey: process.env.ZHIPU_API_KEY,
    headers: {
      "X-Custom-Header": "value"
    }
  }
});

Dynamic Model Selection

const agent = new Agent({
  name: "dynamic-agent",
  model: ({ runtimeContext }) => {
    const useAdvanced = runtimeContext.task === "complex";
    return useAdvanced
      ? "zai-coding-plan/glm-4.6"
      : "zai-coding-plan/glm-4.5";
  }
});