The Model Autopsy — the o1 shutdown post-mortem with the full patient write-up, autopsy verdict, GPT-5.x successor path, 4-step migration checklist, and who got hurt — now lives on our OpenAI model shutdown memorial page, merged with the Eulogy Hotline. Cybersecurity news readers are redirected automatically.
— Ingenious AI security check.
To model-eulogy-hotline.html — the merged page carries the entire autopsy: what o1 was good at, the vendor-deprecation verdict, the GPT-5.x replacement path, the migration checklist, and the who-got-hurt lesson, alongside the eulogy wall for all six retired models. This page redirects you automatically; use the link below if it does not.
The o1 Model Autopsy now lives on the OpenAI model shutdown memorial page. Redirecting you now…
A placeholder page that forwards you to the current version of a check — used here because the o1 post-mortem moved from its own page into the OpenAI model shutdown memorial.
o1 (Sep 2024 – Oct 2026) was OpenAI's first reasoning model. It worked through problems step by step with an internal chain-of-thought before answering, which made it strong on complex reasoning tasks like math, science and code reasoning — at the cost of slower responses than chat models.
OpenAI's stated successor path is the GPT-5.x reasoning model line, per OpenAI's own migration guidance. Test the replacement on your own evals before cutting over — behavior, latency and cost will differ from o1.
Audit every place the model is pinned, run the vendor's recommended replacement against your own evals, and compare behavior, latency and cost before switching traffic. Watch pinned model names in config files — they are the most common migration trap.
Ingenious AI publishes 21 live security platforms, and 100% of them run on permanent getingeniousai.com domains.