This guide will help you quickly get started with the Z.AI Open Platform. From registering an account to making your first API call, it only takes a few minutes to complete.

​
Getting Started

1

Get API Key

2

Choose Model

The platform offers multiple models, and you can select the appropriate model based on your needs. For detailed model introductions, please refer to the Models & Agents.

GLM-4.5

Our latest flagship models, purpose-built as foundational models for agent-oriented applications

GLM-4.5V

New generation of visual reasoning models based on the MOE architecture,achieving SOTA among open-source VLMs

GLM-4-32b-0414-128K

Highly cost-effective foundation language model

CogVideoX-3

New frame generation capabilities that significantly improve image stability and clarity
3

Choose the Calling Method

Our platform provides various development approaches; you can select the best fit for your project needs and tech stack.

HTTP API

Standard RESTful API, compatible with all programming languages.

Z.AI Python SDK

Official Python SDK, featuring full type hints and async support.

Z.AI Java SDK

Official Java SDK, designed for high concurrency and availability.

OpenAI Python SDK

OpenAI SDK Compatibility, quickly migrating from OpenAI.

API Reference

Complete API documentation with parameter descriptions.
4

Make API Call

After preparing your API Key and selecting a model, you can start making API calls. Here are examples using curl, Python SDK, and Java SDK:
curl -X POST "https://api.z.ai/api/paas/v4/chat/completions" \
-H "Content-Type: application/json" \
-H "Accept-Language: en-US,en" \
-H "Authorization: Bearer YOUR_API_KEY" \
-d '{
    "model": "glm-4.5",
    "messages": [
        {
            "role": "system",
            "content": "You are a helpful AI assistant."
        },
        {
            "role": "user",
            "content": "Hello, please introduce yourself."
        }
    ]
}'

​
Get More

API Reference

Access API Reference.

Python SDK

Access Python SDK Github

Java SDK

Access Java SDK Github