GLM-4.5 Flash API
About
Process massive datasets with GLM-4.5 Flash, featuring an expansive 128K context window for long-document analysis. This model delivers available completely free of charge, native tool calling support. Access GLM-4.5 Flash via the LLM Gateway API with up to 16K output tokens.
Capabilities
Input Modalities
text
Output Modalities
text
Reasoning
No
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
128K
Tokens
Input Limit
128K
Tokens
Max Output
16K
Tokens
Pricing
Standard (per 1M tokens)
Input
Free
Output
Free
Frequently Asked Questions
GLM-4.5 Flash by LLM Gateway costs Free per 1M input tokens and Free per 1M output tokens.
Model Details
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
LLMGATEWAY_API_KEY
API Base URL
https://api.llmgateway.io/v1