Luna's price has fallen from $1 to $0.20 per million input tokens and from $6 to $1.20 per million output tokens. GPT-5.6 Terra is also 20% cheaper, while flagship GPT-5.6 Sol remains at its existing price. The new Luna pricing undercuts several competing models, although some Chinese flash models remain cheaper on a pure token-cost basis. What Developers Actually GainAt $0.20 per million input tokens and $1.20 per million output tokens, developers can afford to run Luna through workflows that become difficult to justify at higher prices. Their benefit is indirect: where products or services use these cheaper models, developers may eventually be able to offer more AI features at the same price.