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GPT-5.6 Luna

OpenAI · proprietary · gpt-5.6-luna

GPT-5.6 Luna is the fastest and most cost-efficient tier of OpenAI's GPT-5.6 family, designed for cost-sensitive, high-volume workloads. It brings strong capability at OpenAI's lowest GPT-5.6 price, supports max reasoning effort, and has a 1.05M-token context window.

ConnectorsGPQASearch and FCapture-the-Terminal-BenBrowseComp

Benchmark scores

BenchmarkScore
Connectors1.00
GPQA0.92
Search and Function-Calling0.90
Capture-the-Flag Challenges (Internal)0.85
Terminal-Bench 2.10.85
BrowseComp0.83
MMMU-Pro0.78
BenchCAD (with Python tool)0.74

Pricing

  • OpenAI$0.20 / $1.20

Input / output per 1M tokens

AA metrics

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Arena Elo

  • No Arena snapshot linked.