GPT-5.6 Luna outperforms GPT-5.5 on health reasoning, while being 25x cheaper(twitter.com)

GPT-5.6 is a major step forward for health intelligence. Across the lineup, we’re delivering stronger performance at lower cost: GPT-5.6 Luna outperforms GPT-5.5 at its highest reasoning setting while costing 25x less. Together, these advances raise quality while making