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

glm-5.3

zai/glm-5.3

Changes · 27 entries

zai/glm-5.3createca7a400Nov 2, 2026, 03:02 AM

zai/glm-5.3updateb2f45bfOct 29, 2026, 03:29 AM

pricinginput$0.18→$0.07

zai/glm-5.3update4e8b6afOct 21, 2026, 06:35 AM

pricinginput$0.05→$0.18

zai/glm-5.3update42a9895Oct 20, 2026, 06:39 AM

pricinginput$0.06→$0.05output$1.2→$1.4

zai/glm-5.3update49ce653Oct 19, 2026, 06:45 AM

pricingoutput$2.5→$1.2

zai/glm-5.3update63ba2aaOct 18, 2026, 06:34 AM

pricinginput$0.15→$0.06output$2.4→$2.5

zai/glm-5.3update03ad82bOct 17, 2026, 06:33 AM

pricinginput$0.02→$0.15output$2.5→$2.4

zai/glm-5.3updatebcf2693Oct 16, 2026, 06:36 AM

pricinginput$0.06→$0.02

zai/glm-5.3updateb92059eOct 15, 2026, 06:37 AM

pricingoutput$2.2→$2.5

zai/glm-5.3update0d5a9a1Oct 14, 2026, 06:38 AM

pricinginput$0.04→$0.06

zai/glm-5.3update29d19afOct 13, 2026, 06:43 AM

pricinginput$0.03→$0.04

zai/glm-5.3updatedcc4383Oct 11, 2026, 06:38 AM

pricingoutput$2.5→$2.2

zai/glm-5.3updatec3d6504Oct 10, 2026, 06:38 AM

pricinginput$0.05→$0.03

zai/glm-5.3update70614e7Oct 9, 2026, 06:39 AM

pricinginput$0.06→$0.05

zai/glm-5.3updateda0e420Oct 8, 2026, 06:41 AM

pricinginput$0.03→$0.06

zai/glm-5.3update00710a0Oct 6, 2026, 06:38 AM

pricinginput$0.12→$0.03

zai/glm-5.3update02333c9Oct 3, 2026, 06:38 AM

pricinginput$0.06→$0.12

zai/glm-5.3update2b89bf1Oct 2, 2026, 06:39 AM

pricinginput$0.14→$0.06

zai/glm-5.3update8c801e2Oct 1, 2026, 06:40 AM

pricinginput$0.22→$0.14

zai/glm-5.3update6e8bf55Sep 30, 2026, 06:40 AM

pricinginput$0.18→$0.22output$2.2→$2.5

zai/glm-5.3update1a66bb0Sep 29, 2026, 06:40 AM

pricinginput$0.56→$0.18output$1.83→$2.2

zai/glm-5.3update9cb03f8Sep 26, 2026, 06:38 AM

pricingoutput$2.06→$1.83

zai/glm-5.3update118451aSep 24, 2026, 07:08 AM

pricingoutput$2.2→$2.06

zai/glm-5.3update28ec4f5Sep 23, 2026, 06:40 AM

pricinginput$0.7→$0.56

zai/glm-5.3updated79e481Sep 3, 2026, 06:38 AM

pricinginput$1.2→$0.7output$3.96→$2.2

zai/glm-5.3update639b255Sep 1, 2026, 11:11 AM

pricinginput$1.4→$1.2output$4.4→$3.96

zai/glm-5.3createe3d7dedAug 31, 2026, 04:13 AM