GLM-5.3-Flash

mit321B / 18B

GLM-5.3-Flash/GLM-5.3-FlashX is the first native multimodal model in the GLM-5 series, delivering stronger intelligence than GLM-5.2 at an exceptionally low cost.

Context
1M
Max output
128K
Input price
$0.15/1M tokens
Output price
$0.5/1M 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-Flash
FamilyGLM-5.3
Licensemit
Status—
Typechat
Input modalitiestext
Output modalitiestext
Open weightYes
Parameters321B / 18B
Architecturetransformer
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
$0.15
Output
$0.5
Cache write
—
Cache read
$0.03
Batch in
—
Batch out
—

Family Comparison: GLM-5.3

ModelContextMax out
GLM-5.3-BF161.0M—
GLM-5.3-Flash1M128K
GLM-5.31.0M128K

API

GET/v1/models/huggingface/zai-org/GLM-5.3-Flash