14 January 2027
OpenAI GPT-4o stops receiving security updates. This name is a rolling alias; the date is the one published for gpt-4o-2024-11-20, gpt-4o-2024-08-06 and gpt-4o-2024-05-13. Released 13 May 2024. Source: endoflife.date.
Version End-of-Life Dates calendar