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Z.ai: GLM 4.5 Air (free)

z-ai-glm-4.5-air-freez-aiClosed Source Model

Z.ai: GLM 4.5 Air (free)

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About Z.Ai: GLM 4.5 Air (Free)

GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications. Like GLM-4.5, it adopts the Mixture-of-Experts (MoE) architecture but with a more compact parameter...

Technical Specifications

Model ID
z-ai-glm-4.5-air-free
Category
LLM Models
Task
Text Generation
Added
February 20, 2026

Key Features

  • Chat completion and multi-turn conversation API
  • Streaming response with token-by-token output
  • Function calling and tool use support
  • System prompts and role-based messaging
  • JSON mode and structured output

Quick Start

Integrate Z.Ai: GLM 4.5 Air (Free) into your application with a single API call. Get your API key from the pricing page to get started.

import requests
import json


url = "https://modelslab.com/api/v7/llm/chat/completions"


headers = {
    "Content-Type": "application/json"
}


data = {
        "model_id": "z-ai-glm-4.5-air-free",
        "messages": [
            {
                "role": "user",
                "content": "Hello!"
            }
        ],
        "max_tokens": 1000,
        "key": "YOUR_API_KEY"
    }


try:
    response = requests.post(url, headers=headers, json=data)
    response.raise_for_status()  # Raises an HTTPError for bad responses (4XX or 5XX)
    result = response.json()
    print("API Response:")
    print(json.dumps(result, indent=2))
except requests.exceptions.HTTPError as http_err:
    print(f"HTTP error occurred: {http_err} - {response.text}")
except Exception as err:
    print(f"Other error occurred: {err}")

View the full API documentation for SDKs, code examples in Python, JavaScript, and more.

Use Cases

  • AI chatbots and virtual assistants
  • Code generation and developer tools
  • Content writing and copywriting automation
  • Data analysis, summarization, and extraction
Browse LLM ModelsMore from Z AiView Pricing

Z.Ai: GLM 4.5 Air (Free) FAQ

GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications. Like GLM-4.5, it adopts the Mixture-of-Experts (MoE) architecture but with a more compact parameter...

You can integrate Z.Ai: GLM 4.5 Air (Free) into your application with a single API call. Sign up on ModelsLab to get your API key, then use the model ID "z-ai-glm-4.5-air-free" in your API requests. We provide SDKs for Python, JavaScript, and cURL examples in the API documentation.

The model ID for Z.Ai: GLM 4.5 Air (Free) is "z-ai-glm-4.5-air-free". Use this ID in your API requests to specify this model.

Yes, ModelsLab offers a free tier that lets you try Z.Ai: GLM 4.5 Air (Free) and other AI models. Sign up to get free API credits and start building immediately.