Z.ai: GLM 4.5 Air — AI Model

What is Z.ai: GLM 4.5 Air?

GLM-4.5 Air is the lightweight Mixture-of-Experts variant of Zhipu AI's (Z.ai) flagship GLM model family, available free on OpenRouter. Purpose-built for agent-centric applications with 131K context window. Supports hybrid inference modes — a thinking mode for reasoning and tool use, plus a non-thinking mode for real-time interaction, toggled via a reasoning.enabled parameter. Compact MoE architecture for efficient deployment. Text-only. Also available directly from Z AI's platform. OpenAI-compatible via OpenRouter. Free tier: 200 RPD.

Z.ai: GLM 4.5 Air API Code Example

Paste your API key and run. See the config generator for Claude Code, Cursor, and more tools.

from openai import OpenAI

client = OpenAI(
    base_url="https://openrouter.ai/api/v1",
    api_key="YOUR_API_KEY"
)

response = client.chat.completions.create(
    model="z-ai/glm-4.5-air",
    messages=[{"role": "user", "content": "Hello!"}]
)
print(response.choices[0].message.content)

import OpenAI from "openai";

const openai = new OpenAI({
  baseURL: "https://openrouter.ai/api/v1",
  apiKey: "YOUR_API_KEY",
});

const completion = await openai.chat.completions.create({
  model: "z-ai/glm-4.5-air",
  messages: [{ role: "user", content: "Hello!" }],
});

console.log(completion.choices[0].message.content);

curl https://openrouter.ai/api/v1/chat/completions \
  -H "Content-Type: application/json" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -d '{
    "model": "z-ai/glm-4.5-air",
    "messages": [{"role": "user", "content": "Hello!"}]
  }'

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