OpenAI slashes GPT-5.6 Luna and Terra API prices, adds Fast mode
OpenAI
OpenAI cut GPT-5.6 Luna pricing by 80% (to $0.20/$1.20 per million input/output tokens) and Terra by 20%, crediting efficiency gains from internal model-assisted optimization work. It also introduced a Fast mode for Sol in the API, up to 2.5x faster at double the price, replacing Priority Processing.
Why it matters
Signals falling frontier-adjacent inference costs and a new speed/price tradeoff lever for developers building on the API.
Importance: 3/5
Substantial API price cut (up to 80%) from a frontier lab, market-shaping though not a model release.