OpenAI has updated its API pricing for the GPT-5.6 lineup and added rates for new products. Per 1 million tokens with standard (short) context, GPT-5.6 Sol now costs $4 input / $20 output, Terra $2 / $12, and Luna $0.20 / $1.20 — making Luna roughly 17x cheaper than Sol on output. Long-context pricing is higher: Sol $8/$30, Terra $4/$18, Luna $0.40/$1.80, while cached input costs 10x less than standard input.

The page also lists gpt-5.6-cyber at $12.50 / $75 per million tokens for security tasks, plus web search at $10 per 1,000 calls and $0.03 per 20 minutes for a 1 GB container.

Related: OpenAI Launches Sol Fast Mode and Cuts API Pricing, OpenAI Opens Unfiltered Models to Cybersecurity Professionals via Expanded Daybreak Program

OpenAI API pricing