GPT-5.5 is the most intelligent model to date, faster and more capable, designed to handle complex tasks such as coding, research, and data analysis across tools. It quickly understands user intent and can independently manage multiple tasks, including writing and debugging code and conducting online research. Enhanced intelligence does not compromise speed; token latency matches that of GPT-5.4, while completing the same Codex tasks requires significantly fewer tokens. It also features the strongest security measures, having undergone comprehensive evaluation within a robust security framework, collaborated with internal and external red teams, and incorporated feedback from nearly 200 early access partners.