Z.AI

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

Learn more in the Z.AI 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/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);
}

OpenAI Compatibility

Mastra uses the OpenAI-compatible /chat/completions endpoint. Some provider-specific features may not be available. Check the Z.AI documentation for details.

Models

Model	Image	Audio	Video	Tools	Streaming	Context Window
zai/glm-4.5-flash	✗	✗	✗	✓	✗	131,072
zai/glm-4.5	✗	✗	✗	✓	✗	131,072
zai/glm-4.5-air	✗	✗	✗	✓	✗	131,072
zai/glm-4.5v	✓	✗	✓	✓	✗	64,000
zai/glm-4.6	✗	✗	✗	✓	✗	204,800

Advanced Configuration

Custom Headers

const agent = new Agent({
  name: "custom-agent",
  model: {
    url: "https://api.z.ai/api/paas/v4",
    modelId: "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/glm-4.6" : "zai/glm-4.5";
  },
});