Today I had ChatGPT 4 (Not GPT 4) correct itself mid-response. I was asking it something very simple about regexes:

> How about matching 'a' as the second character of a string only?

It responsed with the wrong regex plus a bunch of explanatory junk:

> '^a.'

Then halfway through the explanatory junk, it corrected itself like this:

> Apologies for the confusion in the first response, the correct regular expression should be '^.a' for matching 'a' as the second character of a string:

And kept on with the (now correct) explanatory junk.

All in a single response. I've certainly never seen that before (if someone has, please weigh in). Maybe the model hasn't changed, but the pipeline has? Like... there's a second model trying to correct the mistakes of the first, maybe? (timings are probably wrong for that, but something like that)