A few weeks after the arrival of GPT-5.6 with Sol, Terra, and Luna, OpenAI has announced a major price cut. Luna now costs 80% less, while Terra reduces its price by 20%, an improvement that also affects those of us who use ChatGPT Work and Codex.
Luna and Terra become more affordable
Starting July 30, GPT-5.6 Terra costs $2 per million input tokens and $12 per million output tokens. Luna drops to $0.20 and $1.20, respectively. OpenAI’s fast model thus becomes much more appealing for certain tasks; classifying files or emails, preliminary document analysis, or repetitive tasks now come with a much lower cost.
According to OpenAI, the reduction is possible thanks to efficiency improvements resulting from the optimization of the models and of the infrastructure that runs them. Each response now requires less time, fewer tokens, and fewer resources, while offering the same results.
More usage within the same subscriptions
For those of us who use ChatGPT Work for projects and tasks, it comes down to how usage is counted. Terra and Luna now use fewer credits per task, so we can use them for longer before reaching the limits of our subscription.
The monthly fees stay the same overall, but requests are more efficient. Something we’ll also notice especially in Codex’s long workflows, where agents can carry out many more actions in a row. The price cut means you can get more work done within the same plan.
Author: David Bernal Raspall
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