OpenAI lowers the prices of selected GPT-5.6 models as it competes in the AI market. NDTV reports that the company cuts the cost of its smaller GPT-5.6 Luna model by 80% and reduces the price of its mid-tier GPT-5.6 Terra model by 20%, while keeping the price of its biggest, flagship Sol model unchanged. PYMNTS adds that the changes take effect Thursday, July 30, and are accompanied by improved performance for GPT-5.6 Sol in the API. According to PYMNTS, OpenAI states the adjustments aim to make high-volume use of the models more economical while maintaining the Sol model’s pricing. The reports describe the same pricing structure across the outlets: an 80% reduction for Luna, a 20% reduction for Terra, and no price change for Sol, alongside faster Sol performance in the API. Both sources present the updates as part of OpenAI’s ongoing model and pricing strategy amid intensifying competition in AI services.