OpenAI cuts prices for two of its GPT-5.6 AI models as companies grow sensitive to costs

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Published Thursday, July 30, 2026 · 8:16 PM EDT

OpenAI is sharply reducing the prices of two models in its GPT-5.6 frontier series, cutting GPT-5.6 Luna by 80% and GPT-5.6 Terra by 20%. OpenAI co-founder and CEO Sam Altman took to X to announce the changes as "major price cuts today." OpenAI says Luna will now cost $0.20 per million input tokens and $1.20 per million output tokens, for a combined input-plus-output price of $1.40 per million tokens. Terra will cost $2 per million input tokens and $12 per million output tokens, for a combined price of $14.

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