glm-5.3

Name: glm-5.3
Author: Vercel AI Gateway

mit

GLM-5.3 is Z.ai's latest flagship model, delivering comprehensive advancements in complex software engineering and agent capabilities. It uses the same base model as GLM-5.2, with all improvements driven by post-training. Compared with GLM-5.2, it delivers significantly stronger performance in complex programming and long-horizon tasks:

Context

Max output

128K

Input price

$0.07/1M tokens

Output price

$1.4/1M tokens

Capabilities

Show unsupported (1)

Reasoning & Interaction

Reasoning

Tool Calling

Output Control

Structured Output

JSON Mode

Infrastructure

Streaming

Prompt Caching

Fine-tuning

Details

Model IDzai/glm-5.3

ProviderVercel AI Gateway

CreatorZ.AI (Zhipu)

Familyglm-5.3

Licensemit

Status—

Typechat

Input modalitiestext

Output modalitiestext

Open weightYes

Parameters—

Architecture—

Context window1M tokens

Max input—

Max output128K tokens

Reasoning tokens—

Knowledge cutoff—

Release date—

Sourceofficial

Tools

Function Callingfunction_calling

Call external functions and APIs

Pricing

Input

$0.07

Output

$1.4

Cache write

—

Cache read

—

Batch in

—

Batch out

—

Family Comparison: glm-5.3

Model	Caps	Perf	Speed	Context	Max out	Pricing
glm-5.3-flash	RTJJMSPCF	—	—	1M	128K	$0.04$0.07
glm-5.3	RTJJMSPCF	—	—	1M	128K	$0.07$1.4
glm-5.3-flashx	RTJJMSPCF	—	—	1M	128K	$0.37$1.25
glm-5.3-promo-50	RTS	—	—	1M	—	$0.7$2.2
glm-5.3-fast	RTS	—	—	1M	—	$2.1$6.6

API

GET/v1/models/vercel/zai/glm-5.3