OpenAI Cuts GPT-5.6 API Prices by Up to 80%

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OpenAI cut GPT-5.6 Luna prices 80% and Terra prices 20%, and added a faster Sol option, citing self-applied efficiency gains from GPT-5.6 optimizing its own serving stack.

1 min read|agenticonsult Intelligence

OpenAI Cuts GPT-5.6 API Prices by Up to 80%

OpenAI dropped GPT-5.6 Luna pricing 80% to $0.20/$1.20 per million tokens and Terra 20% to $2/$12, while adding a Fast mode for Sol at up to 2.5x speed for 2x the price at the same intelligence. OpenAI says the cuts stem from applying GPT-5.6 Sol to its own serving stack post-deployment: 20% lower serving costs from GPU kernel improvements and 15%+ better efficiency from speculative decoding.

Why It Matters

Sam Altman framed it as offering "the best price/intelligence tradeoff at every level" — the latest move in a pricing race where cost-per-completed-task, not cost-per-token, is becoming the metric labs compete on.

Primary source

OpenAI