GPT-6 Luna is a model from OpenAI. Its posted API price is $0.10 per 1M input tokens and $0.50 per 1M output tokens, or $0.20 per 1M tokens blending 3 input tokens with 1 output token. Its price has not changed since Sep 22, 2026. It carries 60.5% of OpenAI's API tokens and is one of the 6 models in the OpenAI token price index, $1.84 per 1M tokens today. Of the 30 models in the token index it is the 26th most expensive. At today's H100 rental price of $3.69 per GPU-hour, its break-even throughput is 5,119 tokens per second per GPU. Prices are collected once a day, for each UTC day.