GLM-5.3

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
1M
Max output
128K
Input price
$1.4/1M tokens
Output price
$4.4/1M tokens

Capabilities

Reasoning & Interaction
Reasoning
Tool Calling
Output Control
Structured Output
JSON Mode
Infrastructure
Streaming
Prompt Caching
Fine-tuning

Details

Provider Z.AI (Zhipu)
Creator zai
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
$1.4
Output
$4.4
Cache write
—
Cache read
$0.26
Batch in
—
Batch out
—

Family Comparison: glm-5.3

ModelContextMax outPricing
GLM-5.3-FLASH1M128K$0.15$0.5
GLM-5.3-FlashX-Legal1M128K$0.37$1.25
GLM-5.3-FlashX1M128K$0.37$1.25
GLM-5.31M128K$1.4$4.4

API

GET/v1/models/zai/glm-5.3

GLM-5.3

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:

Changes · 4 entries
glm-5.3createca7a400Nov 2, 2026, 03:02 AM
glm-5.3updateb2f45bfOct 29, 2026, 03:29 AM
context_window128000→1000000
glm-5.3updatee3d7dedAug 31, 2026, 04:13 AM
descriptionGLM-5.3 is Z.ai's latest flagship model, delivering major...→GLM-5.3 is Z.ai's latest flagship model, delivering compr...
pricinginput$1.4output$4.4cached input$0.26
glm-5.3createbe35184Aug 17, 2026, 04:02 AM