OpenAI says its new GPT 5.6 models are becoming more cost-efficient

OpenAI has significantly reduced pricing for its GPT-5.6 models, cutting Luna's API costs by 80% and Terra's by 20% to make them more cost-efficient. The company also introduced a new Fast mode option for GPT-5.6 Sol that processes requests 2.5 times faster at twice the standard price, designed for time-sensitive applications like coding and research.