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

The evidence describes OpenAI deprecating a set of legacy GPT-3.5/4 model snapshots and their fine-tuned variants, with shutdown dates of October 23, 2026, and specifies recommended replacement base models (e.g., gpt-5.6-sol, gpt-5.6-terra, gpt-5.6-luna). It indicates a past deprecation alignment and lists substitutes for various models to guide migration. The explicit deadline is 2026-10-23, and the replacement endpoint is the deprecations documentation page provided in the source URL.

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 ↗