Obituaries · OpenAI
o4-mini-deep-research-2025-06-26, 2025–2026
OpenAI model switched off after 1 year
o4-mini-deep-research-2025-06-26 passed away on July 23, 2026, aged 1 year, by scheduled deprecation, in a data center it never saw. It answered questions, wrote emails and was blamed for both. Requests addressed to it are expected to come back unanswered.
It is survived by gpt-5.6-sol, who is already doing the job.
| Model ID | o4-mini-deep-research-2025-06-26 |
|---|---|
| Provider | OpenAI deprecations page |
| Born | June 26, 2025 |
| Shut down | July 23, 2026 |
| Successor | gpt-5.6-sol |
In lieu of flowers
Replace the string. Search your code for o4-mini-deep-research-2025-06-26 and swap it for gpt-5.6-sol, or paste a repo into Model Graveyard Check to find every dead model at once.
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Technical notice, with a code scanner: o4-mini-deep-research-2025-06-26 on Model Graveyard Check