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 $0.15/1M input and $0.50/1M output tokens, native tool calling support, open weights architecture. Access GLM-5.3-Flash via the SiliconFlow API with up to 262K output tokens.
Capabilities
Input Modalities
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Output Modalities
text
Reasoning
Yes
Structured Output
Limits
Context Window
1.0M
Tokens
Input Limit
1.0M
Tokens
Max Output
262K
Tokens
Pricing
Standard (per 1M tokens)
Input
$0.15
Output
$0.50
Caching (per 1M tokens)
Read
$0.03
Write
Free
Frequently Asked Questions
GLM-5.3-Flash by SiliconFlow costs $0.15 per 1M input tokens and $0.50 per 1M output tokens. Cached reads cost $0.03 per 1M tokens. Cache writes cost Free per 1M tokens.
Model Details
ID
zai-org/GLM-5.3-Flash
Provider
SiliconFlowFamily
glm-flash
Release Date
Aug 26, 2026
Knowledge Cutoff
N/A
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
SILICONFLOW_API_KEY
API Base URL
https://api.siliconflow.com/v1