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View original post on X: Mark Chen· 62/100AI score62/100

OpenAI cuts GPT-5.6 Luna and Terra API prices and adds Fast mode to Sol

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OpenAI cut API prices for two GPT-5.6 models, with Luna down 80% to $0.20 per million input tokens and $1.20 per million output tokens. Terra drops 20% to $2 input and $12 output per million tokens. GPT-5.6 Sol gains a Fast mode in the API that offers up to 2.5x the speed for 2x the price at the same intelligence level.

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@markchen90

Another step towards intelligence too cheap to meter!

Sam Altman@sama
major price cuts today: *80% drop for GPT-5.6 Luna, now $0.20 per million input tokens and $1.20 per million output *20% drop for GPT-5.6 Terra, to $2/$12 *GPT-5.6 Sol gets Fast mode in the API, up to 2.5x the speed for 2x the price, same intelligence
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Source: Mark Chen · x.comPublished · added here