Shutdown calendar / OpenAI API
o4-mini-deep-research-2025-06-26 shut down on Jul 23, 2026
It is already gone: requests to it fail.
The provider recommends gpt-5.6-sol.
| Platform | ID | Shutdown | Recommended replacement | Source |
|---|---|---|---|---|
| OpenAI API | o4-mini-deep-research-2025-06-26 | Jul 23, 2026 shut down 66d ago | gpt-5.6-sol | official page |
What breaks
- Requests fail. After Jul 23, 2026 every call that names
o4-mini-deep-research-2025-06-26or its aliaseso4-mini-deep-researchreturns an error on OpenAI API. Nothing is migrated for you. - Output changes. A newer model answers differently: length, format, refusals and JSON shape can all shift. Run your own prompts through both models before the date and compare.
Find it in your code
Quick look:
grep -rnF "o4-mini-deep-research-2025-06-26" --include=*.{py,js,ts,go,java,rb,yaml,yml,json,env} .Or scan the whole repo for this and every other retiring model, including parameters the replacement rejects:
Want the migration done?
Our $199 migration report runs your saved prompts on o4-mini-deep-research-2025-06-26 and on the replacement, shows the outputs side by side,
and gives you a ready patch. See pricing.