Obituaries · OpenAI
o3-deep-research-2025-06-26, 2025–2026
Retired by OpenAI
OpenAI has confirmed the retirement of o3-deep-research-2025-06-26, effective July 23, 2026, aged 1 year. It answered questions, wrote emails and was blamed for both. Calls to its ID are now expected to fail.
Its work passes to gpt-5.6-sol, which the family describes as 'recommended'.
| Model ID | o3-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 o3-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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