#o1

The 2026-10-23 legacy snapshot shutdown day: 17 model rows go offline, with the official replacement table

The legacy GPT snapshot batch announced 2026-04-22 expires today: gpt-4-0613, gpt-4-turbo, gpt-4o-2024-05-13, gpt-4.1-nano, o1, o1-pro, o3-mini, o4-mini, gpt-image-1 and fine-tuned versions shut down with row-by-row official replacements.