GPT-5.6 Luna API
About
Build advanced reasoning agents with GPT-5.6 Luna, 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 GPT-5.6 Luna via the Snowflake Cortex API with up to 128K output tokens.
Capabilities
Input Modalities
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Output Modalities
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Reasoning
Yes
Structured Output
Yes
Tool Use
Yes
WeightsClosed
Temperature
Fixed
Attachment
Supported
Limits
Context Window
1.1M
Tokens
Input Limit
922K
Tokens
Max Output
128K
Tokens
Pricing
Standard (per 1M tokens)
Input
Free
Output
Free
Frequently Asked Questions
GPT-5.6 Luna by Snowflake Cortex costs Free per 1M input tokens and Free per 1M output tokens.
Model Details
ID
openai-gpt-5.6-luna
Provider
Snowflake CortexFamily
gpt-luna
Release Date
Jul 9, 2026
Knowledge Cutoff
Feb 16, 2026
API Integration
NPM Package
@ai-sdk/openai-compatible
Environment Variables
SNOWFLAKE_ACCOUNT
SNOWFLAKE_CORTEX_PAT
API Base URL
https://${SNOWFLAKE_ACCOUNT}.snowflakecomputing.com/api/v2/cortex/v1