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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 84% of the 192 commercial models tracked here
- 16 of 88 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: max.
Models at this level cost $1.68 per 1M tokens (median of 14) — this one costs $0.45.
Cheaper and better on this index: GLM 5.3 Flash · Gemini 3.7 Flash (batch)
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. It scores 52.3 on the Artificial Analysis intelligence index.
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 91.1%, Humanity's Last Exam 39.5%, Long Context Reasoning 78.3%, SciCode 52.5%, τ-Bench Banking 31.1%, Terminal-Bench 80.9%. It is particularly used for code generation.
How fast is GPT-5.6 Luna?
It generates about 123.3 tokens per second, with a median 74.49s delay before the first token. Measured independently by Artificial Analysis.