Luna
Model ● Covered in 9 stories + Follow
Luna is an OpenAI API model included in the company’s GPT-5.6 lineup, described as suited for simpler tasks among three variants (Luna, Terra, Sol) with different strengths. In recent coverage, OpenAI cut Luna’s API prices by about 80% to $0.20 per million input tokens and $1.20 per million output tokens shortly after GPT-5.6 launch, with the repricing attributed to cost sensitivity and infrastructure and efficiency improvements.
Updated 10 September 2026
Specifications
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Latest developments
Advancing the price-performance frontier with GPT-5.6
OpenAI · 1 month ago ·
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How to use GPT-5.6
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2026
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OpenAI releases GPT-5.6 model family with efficiency improvements and significant price reductions Model release
OpenAI releases GPT-5.6 family of models (Sol, Terra, Luna) with general availability on Amazon Bedrock Model release
OpenAI releases GPT-5.6 Sol, Terra, and Luna models with improved cost-efficiency Model release
OpenAI releases GPT-5.6 model family with three tiers (Luna, Terra, Sol) and new multi-agent capabilities Model release
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- OpenAI cuts Luna API prices 80% and launches faster Sol inference
- [AINews] GPT 5.6 price cut by 20%-80%: Cost of GPT 5.4 Intelligence dropped 13x in 4 months due to GPT 5.6 recursive self-optimization
- Chinese AI competitors may have forced OpenAI’s hand on pricing
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