Z.ai: GLM 4.5 Air

Name: Z.ai: GLM 4.5 Air
Author: OpenRouter

GLM-4.5-Air is the lightweight variant of our latest flagship model family, also purpose-built for agent-centric applications.

Context

131K

Max output

98K

Input price

$0.13/1M tokens

Output price

$0.85/1M tokens

Capabilities

Show unsupported (4)

Reasoning & Interaction

Reasoning

Tool Calling

Output Control

Structured Output

JSON Mode

Details

Model IDz-ai/glm-4.5-air

ProviderOpenRouter

Creatorz-ai

Familyglm-4.5

License—

Status—

Typechat

Input modalitiestext

Output modalitiestext

Open weight—

Parameters—

Architecture—

Context window131K tokens

Max input—

Max output98K tokens

Reasoning tokens—

Knowledge cutoff—

Release date2025-07-25

Sourceofficial

Tools

Function Callingfunction_calling

Call external functions and APIs

Pricing

Input

$0.13

Output

$0.85

Cache write

—

Cache read

$0.03

Batch in

—

Batch out

—

Family Comparison: glm-4.5

Model	Caps	Perf	Speed	Context	Max out	Pricing
Z.ai: GLM 4.5 Air (free)	RT	—	—	131K	96K	—
Z.ai: GLM 4.5 Air	RTJJM	—	—	131K	98K	$0.13$0.85
Z.ai: GLM 4.5	RTJJM	—	—	131K	98K	$0.6$2.2
Z.ai: GLM 4.5V	RTJJM	—	—	66K	16K	$0.6$1.8

API

GET/v1/models/openrouter/z-ai/glm-4.5-air

Z.ai: GLM 4.5 Air

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.

Changes · 5 entries

z-ai/glm-4.5-airupdateab879c8Jun 18, 2026, 08:32 AM

max_output_tokens131070→98304

pricinginput$0.125→$0.13cached input$0.06→$0.025

z-ai/glm-4.5-airupdatebbc8212May 29, 2026, 12:04 AM

max_output_tokens98304→131070

pricinginput$0.13→$0.125cached input$0.025→$0.06

z-ai/glm-4.5-airupdate1cd659eMar 24, 2026, 04:19 AM

capabilitiesjson modeyes

z-ai/glm-4.5-airupdate2b100acMar 23, 2026, 05:30 AM

familyglm-4.5

model_typechat

release_date2025-07-25

taglineGLM-4.5-Air is the lightweight variant of our latest flag...

tools["function_calling"]

z-ai/glm-4.5-aircreate7f5c66fMar 21, 2026, 05:16 AM