News
OpenAI releases the GPT-5.6 model family
GPT-5.6 Sol, Terra, and Luna entered general availability, with later updates reducing API pricing for the family.
OpenAIModelsAPI
OpenAI introduced GPT-5.6 Sol, Terra, and Luna for general availability. The company describes Sol as its flagship model, Terra as the balanced option, and Luna as the cost-efficient option.
The official release page was subsequently updated with API price reductions, including an August 21 reduction for GPT-5.6 Sol.
Why it matters: Model selection is increasingly a price-performance decision rather than a simple capability ranking. Production teams should measure task success, token use, latency, and total cost on their own workloads.
Source attribution
Original reporting and release information: OpenAI.