GPT-5.6 Luna API

Active
openai/gpt-5.6-luna
by OpenAIrelease date: 7/9/2026

OpenAI GPT-5.6 Luna is the fastest, lowest-cost model in the GPT-5.6 family, built for lightweight multimodal, coding, and agent tasks.

$0.5/$3per 1M tokens
API documentation not available

Technical Specs

Release Date7/9/2026
Input Formats
textimagecodedocument
Output Formats
textjsoncode

Capabilities & Features

Capabilities
text generationreasoningchatcode generationtool callingmultimodal understandingdocument analysisimage understandingagentic workflowsprompt caching
Supported File Types
.txt.md.pdf.json.csv.jpg.jpeg.png.gif.webp
GPT-5.6 Luna API - Cheap API - OpenAI - Defapi