This is the 3rd or 4th time this has happened in the last couple months. Last time it took 8 hours to fix it but getting OpenAI to be aware of the issue is the first problem. The time before that was 24 hours to be aware and fix the issue.
Beware of switching to 4o from 4o mini as the billing is 15X higher than 4o mini.
I switched to 4.1 mini and it’s working for the tasks we needed. The cost is 3X higher but at least it’s working. Planning to switch back to 4o mini when the issue resolves.