OpenAI reaches one billion active users as it cuts GPT-5.6 prices by up to 80%

On July 30, OpenAI cut the price of GPT-5.6 Luna by 80%. It now costs $0.20 per million input tokens and $1.20 per million output tokens, down from $1 and $6, respectively. GPT-5.6 Terra received a smaller 20% reduction, taking its prices from $2.50 and $15 to $2 and $12.