GPT-6 Luna pricing, benchmarks and cost analysis

GPT-6 Luna costs $113 a month for the default workload of 2,000 input and 500 output tokens, 10,000 requests a day with 40% cached input. That is 87% below the median model ($873). It ranks #8 of 101 on cost, where #1 is the cheapest.

It scores 156.8 on the Epoch Capabilities Index (#23 of 66). Among the 17 other models within 2 points, none costs less, and it costs 93% less than their median ($1,740). No other stable-priced model with an ECI at least this high costs less for the same workload.

It generates 92 tokens per second, 9% faster than the median model (84), #11 of 28. Cached input is 90% cheaper than fresh input, in line with the 90% median. It is a proprietary model served by OpenAI. The batch API cuts the default workload to $56.70 a month.