GLM-5.1 API
About
Build advanced reasoning agents with GLM-5.1, a specialized AI model optimized for complex logic and chain-of-thought tasks. This model delivers cost-effective pricing at $1.40/1M input and $4.40/1M output tokens, native tool calling support, open weights architecture. Access GLM-5.1 via the Together AI API with up to 131K output tokens.
Capabilities
Input Modalities
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Output Modalities
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Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsOpen
Limits
Context Window
203K
Tokens
Input Limit
203K
Tokens
Max Output
131K
Tokens
Pricing
Standard (per 1M tokens)
Input
$1.40
Output
$4.40
Frequently Asked Questions
GLM-5.1 by Together AI costs $1.40 per 1M input tokens and $4.40 per 1M output tokens.
Model Details
API Integration