Z.ai: GLM 4.5 Air
Analysis Summary
GLM 4.5 Air is Z.ai's cost-optimised variant of the GLM 4.5 family, with an intelligence index of 16.5 and a coding index of 23.8. Its agentic index of 33.5 is slightly above the full GLM 4.5, and its math score of 80.7 is strong for the tier. Tool use and function calling are supported, and livecodebench at 0.684 shows reasonable code generation capability.
For business use, GLM 4.5 Air suits high-volume, cost-sensitive pipelines where moderate reasoning and coding capability are sufficient. Its instruction following is below average, which limits reliability for precise structured output tasks. The 131K context window covers most document-level workloads.
At $0.13 input and $0.85 output, it offers better value than the full GLM 4.5 for lighter tasks. A -4 point regional penalty applies. Teams needing a cheap, tool-capable model for automation or coding assistance may find it useful, but businesses requiring consistent instruction adherence should evaluate alternatives.
Assessed June 17, 2026
Editorial notes
GLM 4.5 Air is a lighter, cheaper variant of GLM 4.5 with strong math and agentic scores for its price, though reasoning depth is limited and enterprise availability is narrow.
Rankings consider pricing, capabilities, benchmarks, and real-world applicability and are refreshed as new models launch. Feedback?
Performance Profile
How Z.ai: GLM 4.5 Air compares
Z.ai: GLM 4.5 Air ranks #158 of 380 AI models we track for overall intelligence, #125 of 317 for coding, #135 of 292 for agentic tasks. Its 131K-token context window is larger than 59% of the models we list. At $0.13 per million input tokens it is cheaper than 60% of comparable models.
About Z.ai: GLM 4.5 Air
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..
Capabilities
Performance Indices
Source: Artificial Analysis
Benchmark Scores
Intelligence
Technical
Content
Benchmark data from Artificial Analysis and Hugging Face
How does Z.ai: GLM 4.5 Air stack up?
Compare side-by-side with other professional models.
Model Information
| OpenRouter ID |
z-ai/glm-4.5-air
|
| Provider | z-ai |
| Release Date | July 25, 2025 |
| Context Length | 131,072 tokens |
| Max Completion | 98,304 tokens |
| Status | Active |
Pricing
| Token Type | Cost per 1M tokens | Cost per 1K tokens |
|---|---|---|
| Input | $0.13 | $0.000130 |
| Output | $0.85 | $0.000850 |
Live Performance
Live endpoint metrics, refreshed every 30 minutes.
Leaderboard Categories
External Resources
Frequently asked questions about Z.ai: GLM 4.5 Air
How much does Z.ai: GLM 4.5 Air cost?
Z.ai: GLM 4.5 Air costs $0.13 per million input tokens and $0.85 per million output tokens.
What is the context window of Z.ai: GLM 4.5 Air?
Z.ai: GLM 4.5 Air has a context window of 131,072 tokens (131K).
Is Z.ai: GLM 4.5 Air good for coding?
On our coding benchmark index, Z.ai: GLM 4.5 Air ranks #125 of 317 models, placing it in the broader range of the field for code generation and debugging.
What can Z.ai: GLM 4.5 Air do?
Z.ai: GLM 4.5 Air supports tool use and function calling.
Who created Z.ai: GLM 4.5 Air?
Z.ai: GLM 4.5 Air is developed by Z.ai and was released on July 25, 2025.
