GLM-5.3

mit

GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves on GLM-5.2 in coding and in the balance between performance and token efficiency.

Context
1.0M
Max output
128K
Input price
$0.9/1M tokens
Output price
$4/1M tokens

Capabilities

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

Details

Model IDzai-org/GLM-5.3
Provider DeepInfra
Creator Z.AI (Zhipu)
FamilyGLM-5.3
Licensemit
Statusactive
Typechat
Input modalitiestext
Output modalitiestext
Open weightYes
Parameters—
Architecture—
Context window1.0M tokens
Max input—
Max output128K tokens
Reasoning tokensYes
Knowledge cutoff—
Release date—
Sourceofficial

Tools

Function Callingfunction_calling
Call external functions and APIs

Endpoints

Chat CompletionsPOST
Generate chat responses with messageshttps://api.deepinfra.com/v1/openai/v1/chat/completions

Pricing

Input
$0.9
Output
$4
Cache write
—
Cache read
$0.2
Batch in
—
Batch out
—

Family Comparison: GLM-5.3

ModelContextMax outPricing
GLM-5.3-Flash1.0M128K$0.15$0.5
GLM-5.31.0M128K$0.9$4

API

GET/v1/models/deepinfra/zai-org/GLM-5.3

GLM-5.3

zai-org/GLM-5.3

GLM-5.3 is a large-scale reasoning model from Z.ai, built for complex software engineering and long-horizon agent tasks. It supports text input and output with a 1M-token context window, and improves on GLM-5.2 in coding and in the balance between performance and token efficiency.

Changes · 6 entries
zai-org/GLM-5.3createca7a400Nov 2, 2026, 03:02 AM
zai-org/GLM-5.3update28ec4f5Sep 23, 2026, 06:40 AM
pricinginput$1.2→$0.9
zai-org/GLM-5.3updatea6d63d7Sep 15, 2026, 06:39 AM
pricingcached input$0.12→$0.2
zai-org/GLM-5.3update639b255Sep 1, 2026, 11:11 AM
pricingcached input$0.24→$0.12
zai-org/GLM-5.3updatee3fc6e0Aug 31, 2026, 07:31 AM
quantizationfp8→fp4
zai-org/GLM-5.3createe3d7dedAug 31, 2026, 04:13 AM