OpenAI reduced API pricing for GPT‑5.6 Luna by 80 percent and GPT‑5.6 Terra by 20 percent. It also introduced a faster processing option for Sol at a premium.
Why it matters
The important trend is price-performance, not the sticker price of the strongest model. Lower-cost models that can use tools and complete bounded workflows make it economical to route routine work away from expensive frontier systems and reserve maximum intelligence for the steps that truly need it.
Source: OpenAI, July 30, 2026. 18BYTE independently summarizes and analyzes the announcement; source claims remain attributable to the originating organization or reporting.