GPT-5.6 Luna Price Cut by 80%: What Actually Changes for API, Codex, and ChatGPT Work
이 포스팅은 쿠팡 파트너스 활동의 일환으로, 이에 따른 일정액의 수수료를 제공받습니다.
This article is based on the latest reports and official materials available as of 2026-07-31 Korea time.
On 2026-07-30, OpenAI reduced the price of GPT-5.6 Luna by 80% and Terra by 20%. Per 100 million tokens, Luna now costs USD 0.20 for input and USD 1.20 for output, while Terra costs USD 2 for input and USD 12 for output. However, this does not mean that regular ChatGPT monthly subscription fees have decreased.
The price reductions apply not only to the API but also to usage calculations for Codex and ChatGPT Work under paid subscriptions. It is also important to distinguish this from regular ChatGPT conversations, where users cannot directly select Luna or Terra.
How Much Do GPT-5.6 Luna and Terra Cost Now?
Both input and output token prices for GPT-5.6 Luna have fallen to 20% of their previous levels. Terra now costs 80% of its previous price, while the standard pricing for the higher-tier GPT-5.6 Sol model remains unchanged.
The amounts below are US dollar prices per 100 million text tokens under Standard processing with a short context window.
| Model | Previous Input Price | Current Input Price | Previous Output Price | Current Output Price | Price Reduction |
|---|---|---|---|---|---|
| GPT-5. |
이 포스팅은 쿠팡 파트너스 활동의 일환으로, 이에 따른 일정액의 수수료를 제공받습니다.