Z
GLM 4.5 AirOPEN
GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications.
Prices update automatically — checked daily against provider list prices.
- $0.31 per 1M tokens, assuming 3 input for 1 output the convention used by Artificial Analysis
- cheaper than 54% of the 191 open-weight models tracked here
- 4 of 15 Z.AI models tracked here, from cheapest
Benchmarks & performance
Independent benchmark scores for GLM 4.5 Air, measured by Artificial Analysis. Higher is better.
For the same budget, GLM 4.5 Air delivers 7.1 times more capability. Open weights also mean you can self-host it and pay nothing per token.
Models at this level cost $0.48 per 1M tokens (median of 15) — this one costs $0.31.
Cheaper and better on this index: GLM 5.3 Flash · GPT-5.6 Luna (batch) · DeepSeek V4 Flash 0731 and 24 more
About this model
GLM 4.5 Air is an open-weight AI model by Z.AI. You can download and self-host it for free; the prices below are hosted-API list prices, tracked daily, for when you prefer convenience over self-hosting.
Frequently asked questions
What is GLM 4.5 Air?
GLM 4.5 Air is an AI language model from Z.AI. It is open-weight: you can download it and run it on your own hardware, for free. It scores 16.7 on the Artificial Analysis intelligence index.
Is GLM 4.5 Air free?
The weights are free and open — you can self-host GLM 4.5 Air and pay nothing per token. If you prefer a hosted API, list prices are $0.13 per million input tokens and $0.85 per million output tokens.
What is GLM 4.5 Air good at?
Independent benchmarks from Artificial Analysis give it GPQA 73.3%, MMLU-Pro 81.5%, Humanity's Last Exam 7%, Long Context Reasoning 45.7%, LiveCodeBench 68.4%, SciCode 30.6%, MATH-500 96.5%, AIME 67.3%, AIME 2025 80.7%, IFBench 37.6%, τ²-Bench 46.5%, Terminal-Bench Hard 20.5%. It is particularly used for mathematical reasoning.
Can I self-host GLM 4.5 Air?
Yes. GLM 4.5 Air has open weights, so you can download it and run it on your own GPU or server with tools like Ollama, vLLM or llama.cpp — with no per-token cost.