AI Recommendation
Should you use GLM-4.5-Air?
GLM-4.5-Air is listed for chat workloads and supports a 131K context window.
Use it when Z AI (Zhipu AI)'s free tier is enough for evaluation, demos, or light production traffic.
GLM-4.5-Air Free API on Z AI (Zhipu AI)
Free API VerifiedLighter GLM-4.5 variant for fast coding assistance and cheaper agents
Free APIOpenAI compatibleReasoningTool callingReasoning
API Details
Copy-ready connection details
Base URL
https://open.bigmodel.cn/api/paas/v4 Model ID
glm-4.5-air API format OpenAI Chat Completions
Technical Details
GLM-4.5-Air specifications
Context window 131K
Max output 98K
Status Online
Family glm-air
Knowledge cutoff 2025-04
Released Jul 28, 2025
Last updated Jul 28, 2025
Free listing since Jul 25, 2025
Input text
Output text
Capabilities reasoning, tool calling, temperature control
Open weights Yes
Weights Hugging Face
External benchmark references
| Benchmark | Score | Metric | Date |
|---|---|---|---|
| Artificial Analysis Coding Index | 23.8 | index | 2026-05-30 |
| SciCode | 30.6 | percent correct | 2026-05-30 |
| Terminal-Bench Hard | 20.5 | success rate | 2026-05-30 |
Best for
- Chat
Strengths & Weaknesses
Strengths
- Long context window
- Reasoning mode listed
- Tool calling support
- Open weights available
Watch outs
- Vision support is not listed
Benchmark Overview
Benchmark signals for GLM-4.5-Air
Intelligence General reasoning and instruction following
23.2/100 Coding Programming and code generation
23.8/100 Agentic Tool use and multi-step tasks
21/100 Context Maximum listed context window
131K Pricing
GLM-4.5-Air pricing per 1M tokens
Input $0.2 per 1M tokens
Output $1.1 per 1M tokens
Free access Available Z AI (Zhipu AI)
Availability
GLM-4.5-Air availability by provider
We only found this glm-4-5-air listing on Z AI (Zhipu AI) in the current catalog. Use the related models section for nearby alternatives.
| Provider | Model listing | Access | Context | API | Limits |
|---|---|---|---|---|---|
| | GLM-4.5-Air | Free tier | 131K | Native | Varies |
Compare
GLM-4.5-Air alternatives to consider
| Model | Provider | Context | Access |
|---|---|---|---|
| GLM-4.7-Flash | Z AI (Zhipu AI) | 200K | Free tier |
| GLM-4.5-Flash | Z AI (Zhipu AI) | 128K | Free tier |
| GLM-4.6V-Flash | Z AI (Zhipu AI) | 128K | Free tier |
Typical Use Cases
GLM-4.5-Air use cases
Chat
GLM-4.5-Air is tagged for chat in this catalog and works with OpenAI-compatible client libraries.
FAQ
GLM-4.5-Air free API FAQ
Is GLM-4.5-Air free to use?
GLM-4.5-Air is listed with free API access on Z AI (Zhipu AI), subject to the provider's quota and account policy.
What is the GLM-4.5-Air model ID?
The model ID shown in this catalog is glm-4.5-air.
What context window does GLM-4.5-Air support?
The listed context window is 131K tokens with up to 98K output tokens.
More about GLM-4.5-Air
Free GLM-4.5-Air API.
For API keys, setup steps, and provider-level limits, see the Z AI (Zhipu AI) provider page.