Honestly this is a bit surprising. When was the last time you tried it? We made a major upgrade about 1.5 months ago which should have made it just as snappy as many of the big AI providers, but there are always inconsistencies. Sometimes certain models go down, sometimes they get slow for a half a day, etc. That could have been it. Please try it again.
I'm guessing that you tried GPT5 Pro which was a bit of a trainwreck... it had many problems. Was that it?