GLM 5.3 Flash

mit320B / 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 IDglm-5.3-flash
Familyglm-5.3
Licensemit
Statusactive
Typechat
Input modalitiestext
Output modalitiestext
Open weightYes
Parameters320B / 18B
Architecture—
Context window1M tokens
Max input—
Max output128K tokens
Reasoning tokens—
Knowledge cutoff—
Release date—
Sourceofficial

Pricing

Input
$0.15
Output
$0.5
Cache write
—
Cache read
$0.03
Batch in
—
Batch out
—

Family Comparison: glm-5.3

ModelContextMax outPricing
GLM-5.3-Flash Free——$0$0
GLM 5.3 Flash1M128K$0.15$0.5
GLM 5.31M128K$1.4$4.4

API

GET/v1/models/opencode/glm-5.3-flash

GLM 5.3 Flash

glm-5.3-flash

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.

Changes · 2 entries
glm-5.3-flashcreateca7a400Nov 2, 2026, 03:02 AM
glm-5.3-flashcreate5cd8ca9Sep 6, 2026, 06:34 AM