Nundina › Discover calendars › Version End-of-Life Dates calendar › OpenAI GPT-5.3 Chat end of lifeOpenAI GPT-5.3 Chat end of life10 August 2026OpenAI GPT-5.3 Chat stops receiving security updates. Released 3 Mar 2026. Source: endoflife.date.Version End-of-Life Dates calendarMore from this calendar