OpenAI announced on July 30 an 80% price cut for its Luna model, the entry-level option in the GPT-5.6 family. Input costs dropped from $1 to $0.20 per million tokens, while output costs fell from $6 to $1.20 per million tokens. The mid-tier Terra model saw a more modest 20% reduction, while the flagship Sol model remained unchanged at $5 for input and $30 for output per million tokens. This decision follows a previous 20% reduction in GPT-4 Turbo API pricing on July 19, as companies questioned the return on investment of their AI spending and Chinese competitors offered lower-priced alternatives.
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