OpenAI slashes Luna 80% as Chinese open-weight models take token share
OpenAI slashed the price of its cheapest and fastest model, GPT-5.6 Luna, by 80% on July 30. That’s about three weeks after the GPT-5.6 line went to users.
Chinese open-weight models continue to pull token traffic from US labs on price, especially for developers running big batches of AI work.
OpenAI cuts Luna 80% and Terra 20%
OpenAI announced new pricing for Luna at $0.20 per million input tokens and $1.20 per million output tokens. Prices for Terra, the middle tier aimed at everyday tasks, slid 20% to $2 and $12 per million tokens. Sol, the best coding model from OpenAI, remained at $5 per million input tokens and $30 per million output tokens.
The company has swapped out its previous Priority Processing tier for a new “Fast Mode” that it claims can run Sol up to 2.5 times faster than standard processing, while maintaining the same level of model intelligence.
Fast mode costs twice as much, so Sol under the fast tier costs $10 per million input tokens and $60 per million output tokens. The change is backward compatible, and developers who already used the priority tier will be automatically migrated and won’t need to change their integrations, according to OpenAI.
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