Retiring GPT-4.5
Mostly infrastructure housekeeping — if you had older conversations running on GPT-4.5, they've automatically moved to the newer GPT-5.5 model. Nothing for you to do.
What changed
Source summary
GPT-4.5 was removed from ChatGPT; existing conversations that had been using it automatically continued on GPT-5.5.
Why it matters to your work
Practical interpretation
Mostly infrastructure housekeeping — if you had older conversations running on GPT-4.5, they've automatically moved to the newer GPT-5.5 model. Nothing for you to do.
What to try next
If you had a saved prompt or workflow pinned to GPT-4.5, open it and rerun it once on GPT-5.5 to confirm the automatic switch didn't change the output you were relying on.
Source & availability
This is a summary of a published provider announcement, with practical context from SCALA’s feed.
Plan, region, workspace and rollout conditions may affect access in Australia. Check the original source for current availability.
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