GLM-4.5-Air | Epoch AI

ECI

N/A

Z.ai (Zhipu AI)

Jul. 20, 2025

Open weights

GLM-4.5-Air is an open-weights model from Z.ai (Zhipu AI) and Tsinghua University, released July 20, 2025.

GLM-4.5-Air vs select alternatives

Domain	Benchmark	GLM-4.5-Air Z.ai (Zhipu AI) Jul. 20, 2025 Open weights	o3-pro OpenAI Jun. 10, 2025 Closed weights	Grok 4 xAI Jul. 9, 2025 Closed weights	Gemini 2.5 Pro (Jun 2025) Google DeepMind Jun. 5, 2025 Closed weights
Long context	ForecastBenchBest score 62.5	59.2	—	60.9	60.4
Science	Humanity's Last ExamBest score 55%	8%	n/a	n/a	22%
Software engineering	GSOBest score 88%	3%	n/a	n/a	4%

Model metadata

General
Organization	Z.ai (Zhipu AI), Tsinghua University
Release date	Jul. 20, 2025
Model accessibility	Open weights
Country	China
Knowledge cutoff	Unknown
Provider notes	GLM-4.5: Agentic, Reasoning, and Coding (ARC) Foundation Models

Pricing
Input price	$0.14 / 1M tokens
Output price	$0.86 / 1M tokens

Training
Parameters	1.1e11
Training compute	1.7e24 FLOP
Training hardware	Unknown
Training time	Unknown
Training dataset size	Unknown