z-ai/glm-4.5-airGLM-4.5-Air is Z.ai (Zhipu AI),Tsinghua University’s open-weights AI model, released Jul 20, 2025. It costs $0.20/M input and $1.10/M output tokens, and handles a 131K-token context window.
GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications.
Scores on standardized evaluations. Higher is better — and rank shows where GLM-4.5-Air lands among all models tracked on Model Beat.
Graduate-level scientific reasoning
Frontier of human expert knowledge
Broad expert knowledge
Code performance optimization
Contamination-free coding
Scientific research coding
Olympiad-qualifier math
Tool-agent-user reliability
GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications.
GLM-4.5-Air is an AI model developed by Z.ai (Zhipu AI),Tsinghua University, released Jul 20, 2025.
GLM-4.5-Air's list price from Z.ai (Zhipu AI),Tsinghua University is $0.20 per million input tokens and $1.10 per million output tokens. The cheapest credible third-party provider on OpenRouter (Novita) serves it at $0.13/$0.85 per 1M.
GLM-4.5-Air supports a context window of up to 131K tokens.
On standardized evaluations tracked by Epoch AI, GLM-4.5-Air scores 80.7% on AIME 2024/2025, 68.4% on LiveCodeBench, 81.5% on MMLU-Pro.
GLM-4.5-Air is released with open weights (Open weights (unrestricted)), so the model can be downloaded and self-hosted.
Benchmark data from Epoch AI (CC BY) and Artificial Analysis; pricing, specs & descriptions from OpenRouter. Data updated Oct 19, 2026.