GLM 5.3

Name: GLM 5.3
Author: OpenCode Zen

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

$1.4/1M tokens

Output price

$4.4/1M tokens

Capabilities

Show unsupported (1)

Reasoning & Interaction

Reasoning

Tool Calling

Output Control

Structured Output

JSON Mode

Infrastructure

Streaming

Prompt Caching

Fine-tuning

Details

Model IDglm-5.3

ProviderOpenCode Zen

CreatorZ.AI (Zhipu)

Familyglm-5.3

Licensemit

Statusactive

Typechat

Input modalitiestext

Output modalitiestext

Open weightYes

Parameters—

Architecture—

Context window1M tokens

Max input—

Max output128K tokens

Reasoning tokens—

Knowledge cutoff—

Release date—

Sourceofficial

Pricing

Input

$1.4

Output

$4.4

Cache write

—

Cache read

$0.26

Batch in

—

Batch out

—

Family Comparison: glm-5.3

Model	Caps	Perf	Speed	Context	Max out	Pricing
GLM-5.3-Flash Free	S	—	—	—	—	$0$0
GLM 5.3 Flash	RTJJMSPCF	—	—	1M	128K	$0.15$0.5
GLM 5.3	RTJJMSPCF	—	—	1M	128K	$1.4$4.4

API

GET/v1/models/opencode/glm-5.3