@OpenAI today cut pricing for GPT-5.6 Luna and Terra - Luna is now 80% cheaper per task. Terra remains largely behind Luna and Sol on the Pareto frontier, with a more modest 20% reduction in Cost per Task
OpenAI announced a reduction in token pricing for GPT-5.6. Luna pricing fell from $1.00/$6.00 to $0.20/$1.20 per million input/output tokens. GPT-5.6 Terra also had a price reduction, from $2.50/$15.00 to $2.00/$12.00. However, Terra is still not on the Pareto frontier of the Artificial Analysis Intelligence Index vs Cost per Task.
Cost per Task has fallen 80% and 20% for Luna and Terra respectively. Chart excludes non-reasoning variants.