OpenAI Slashes GPT-5.6 Luna API Price by 80%, Terra by 20%

OpenAI · x · 2026-07-31

OpenAI announced significant API price reductions across its models to improve cost efficiency. The price for GPT-5.6 Luna has been slashed by 80%, while GPT-5.6 Terra is reduced by 20%.

Additionally, a faster processing option for GPT-5.6 Sol is now available. These lower costs are reflected in usage counting for Codex and ChatGPT Work, extending user capacity for agentic workflows.

Related event: OpenAI Launches GPT-5.6 with Massive Price Cuts(48 posts)→

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