OpenAI Reaches One Billion Active Users and Cuts GPT-5.6 Luna and Terra Prices by Up to 80%

OpenAI has reduced prices for two GPT-5.6 models by up to 80% and announced its models now serve over one billion active users. On July 30, the price of GPT-5.6 Luna dropped by 80% and GPT-5.6 Terra by 20%. The following day, OpenAI disclosed the billion-user milestone.