GLM-4.5-Air Free API on Z AI (Zhipu AI)

Free API Verified

Available from Z AI (Zhipu AI)

★★★★★★★★★★ 3.5 Benchmark-backed score

Lighter GLM-4.5 variant for fast coding assistance and cheaper agents

Free APIZ AI (Zhipu AI) nativeReasoningTool callingReasoning

Try in Playground Compare Save

Context window 131K

Max output 98K

API format Z AI (Zhipu AI) native

Status Online

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.

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

Measured data

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

Model Metadata

GLM-4.5-Air model ID and technical details

Provider and model catalog

Model ID glm-4.5-air

Family glm-air

Knowledge cutoff 2025-04

Released Jul 28, 2025

Last updated Jun 30, 2026

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

Pricing

GLM-4.5-Air pricing per 1M tokens

Free tier listed

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

Current provider only

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
Z AI (Zhipu AI)	GLM-4.5-Air	Free tier	131K	Native	Varies

View Z AI (Zhipu AI) setup guide →

Compare

GLM-4.5-Air alternatives to consider

Open comparison

Model	Provider	Context	Access
GLM-4.7-Flash	Z AI (Zhipu AI)	200K	Free tier
GLM-4.6V-Flash	Z AI (Zhipu AI)	128K	Free tier
GLM-4.5-Flash	Z AI (Zhipu AI)	128K	Check provider

Typical Use Cases

GLM-4.5-Air use cases

Chat

GLM-4.5-Air is tagged for chat in this catalog.

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.