GLM-5.3-Flash API
About
Build advanced reasoning agents with GLM-5.3-Flash, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $0.12/1M input and $0.42/1M output tokens, native tool calling support, open weights architecture. Access GLM-5.3-Flash via the Volcengine Ark API with up to 131K output tokens.
Capabilities
Input Modalities
textimagevideopdf
Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
131K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.12
Output
$0.42
Caching (per 1M tokens)
Read
$0.03
Frequently Asked Questions
GLM-5.3-Flash by Volcengine Ark costs $0.12 per 1M input tokens and $0.42 per 1M output tokens. Cached reads cost $0.03 per 1M tokens.
Model Details
ID
glm-5-3-flash-260828
Provider
Volcengine ArkFamily
glm-flash
Release Date
Aug 26, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
ARK_API_KEY
API Base URL
https://ark.cn-beijing.volces.com/api/v3