GLM 5.1 Fast API
About
Process massive datasets with GLM 5.1 Fast, featuring an expansive 200K context window for long-document analysis. This model delivers cost-effective pricing at $1.10/1M input and $3.60/1M output tokens, native tool calling support, open weights architecture. Access GLM 5.1 Fast via the Neuralwatt API with up to 200K output tokens.
Capabilities
Input Modalities
text
Output Modalities
text
Reasoning
No
Structured Output
No
Tool Use
Yes
WeightsOpen
Temperature
Adjustable
Attachment
Not Supported
Limits
Context Window
200K
Tokens
Input Limit
200K
Tokens
Max Output
200K
Tokens
Pricing
Standard (per 1M tokens)
Input
$1.10
Output
$3.60
Frequently Asked Questions
GLM 5.1 Fast by Neuralwatt costs $1.10 per 1M input tokens and $3.60 per 1M output tokens.
Model Details
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
NEURALWATT_API_KEY
API Base URL
https://api.neuralwatt.com/v1