Agent Breaking Changes_

← Model deprecations

OpenAI Deprecations page changed: OpenAI

2026-10-27 · official page

Summary

• +Account security notification
• -The following fine-tuned versions were also shut down on October 23, 2026:
• -Shutdown date
• -Model snapshot
• -Recommended replacement base model

Full notes

+Account security notification
-The following fine-tuned versions were also shut down on October 23, 2026:
-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
+Fine-tuned versions of these models follow the same shutdown schedule as their underlying base models.
-To improve reliability and make it easier for developers to choose the right models, we are deprecating a set of older OpenAI models with declining usage over the next six to twelve months. Access to these models will be shut down on the dates below.
+To improve reliability and make it easier for developers to choose the right models, we deprecated a set of older OpenAI models with declining usage. Access to these models was shut down on September 28, 2026.