GLM-4.5-Flash API
About
Build advanced reasoning agents with GLM-4.5-Flash, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers available completely free of charge, native tool calling support. Access GLM-4.5-Flash via the DevPass (LLM Gateway) API with up to 98K output tokens.
Capabilities
Input Modalities
text
Output Modalities
text
Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
128K
Tokens
Input Limit
128K
Tokens
Max Output
98K
Tokens
Pricing
Standard (per 1M tokens)
Input
Free
Output
Free
Caching (per 1M tokens)
Read
Free
Write
Free
Frequently Asked Questions
GLM-4.5-Flash by DevPass (LLM Gateway) costs Free per 1M input tokens and Free per 1M output tokens. Cached reads cost Free per 1M tokens. Cache writes cost Free per 1M tokens.
Model Details
ID
glm-4.5-flash
Provider
DevPass (LLM Gateway)Family
glm-flash
Release Date
Jul 28, 2025
Knowledge Cutoff
Apr 1, 2025
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
LLMGATEWAY_API_KEY
API Base URL
https://api.llmgateway.io/v1