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GPT-5.6 LunaAPI
GPT-5.6 Luna is a fast, cost-efficient model in OpenAI's GPT-5.6 series.
Prices update automatically — checked daily against provider list prices.
- $0.45 per 1M tokens, assuming 3 input for 1 output the convention used by Artificial Analysis
- cheaper than 83% of the 226 commercial models tracked here
- 21 of 101 OpenAI models tracked here, from cheapest
Benchmarks & performance
Independent benchmark scores for GPT-5.6 Luna, measured by Artificial Analysis. Higher is better. Measurement mode: Xhigh.
About this model
GPT-5.6 Luna is a commercial AI model by OpenAI. The specifications below are tracked automatically: pricing is refreshed daily from public list prices, so the numbers on this page reflect the current cost of using the model through its API.
Frequently asked questions
What is GPT-5.6 Luna?
GPT-5.6 Luna is an AI language model from OpenAI. It is a proprietary model, available through an API.
Is GPT-5.6 Luna free?
GPT-5.6 Luna is not free: it costs $0.2 per million input tokens and $1.2 per million output tokens. Open-weight alternatives can be self-hosted at no per-token cost.
What is GPT-5.6 Luna good at?
Independent benchmarks from Artificial Analysis give it GPQA 89.5%, Humanity's Last Exam 37%, Long Context Reasoning 81.7%, SciCode 50.5%, τ-Bench Banking 28.7%, Terminal-Bench 77.9%. It is particularly used for code generation.