Documentation section changed: 2026-04-22: Legacy GPT model snapshots

The evidence describes upcoming deprecations of legacy OpenAI models and associated fine-tuned versions, with shutdown dates of October 23, 2026 and recommended replacement base models (e.g., gpt-5.6-terra, gpt-5.6-sol, gpt-5.6-luna). It does not specify a new policy change beyond the deprecation notice itself, nor a different endpoint beyond the deprecation docs page. The explicit deadline identified is 2026-10-23. The replacement endpoint is taken from the provided URL path for deprecations documentation.

To improve reliability and make it easier for developers to choose the right models, we are deprecating a set of older OpenAI models. Access to these models will be shut down on the dates below. Shutdown date Model snapshot Substitute model October 23, 2026 gpt-3.5-turbo-0125 | gpt-3.5-turbo, gpt-3.5-turbo-completions gpt-5.6-terra October 23, 2026 gpt-4-0613 | gpt-4, gpt-4-0613-completions, gpt-4-completions gpt-5.6-sol October 23, 2026 gpt-4-1106-preview gpt-5.6-sol October 23, 2026 gpt-4-turbo | gpt-4-turbo-2024-04-09, gpt-4-turbo-completions gpt-5.6-sol October 23, 2026 gpt-4.1-nano | gpt-4.1-nano-2025-04-14 gpt-5.6-luna October 23, 2026 gpt-4o-2024-05-13 gpt-5.6-sol October 23, 2026 gpt-image-1 gpt-image-2.5-sunburst or gpt-image-2.5-flare October 23, 2026 o1-2024-12-17 | o1 gpt-5.6-sol October 23, 2026 o1-pro-2025-03-19 | o1-pro gpt-5.6-sol (reasoning.mode: pro) October 23, 2026 o3-mini-2025-01-31 | o3-mini gpt-5.6-sol October 23, 2026 ft-o4-mini-2025-04-16 gpt-5.6-terra October 23, 2026 o4-mini-2025-04-16 | o4-mini gpt-5.6-terra We are also removing fine-tuned versions as below: Shutdown date Model snapshot Recommended replacement base model October 23, 2026 ft-gpt-3.5-turbo gpt-5.6-terra October 23, 2026 ft-gpt-4 gpt-5.6-sol October 23, 2026 ft-gpt-4.1-nano-2025-04-14 gpt-5.6-luna October 23, 2026 ft-babbage-002 gpt-5.6-terra October 23, 2026 ft-davinci-002 gpt-5.6-terra

Deadline Oct 23, 2026Vendor source ↗