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

The evidence describes upcoming deprecations: multiple older OpenAI models and their fine-tuned variants are set to be shut down on October 23, 2026, with specified substitute/guidance (e.g., gpt-5.6-terra, gpt-5.6-sol, etc.). The current text aligns with prior deprecation notices and does not introduce new endpoints or changes beyond listing deprecated models and replacements.

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

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