Was anyone else's experience with GPT4o completely ruined after recent Update?

[qsq]

Just found some posts reporting major underperformance starting from December 19:

Has anyone noticed GPT4o quality drop last few days?

I’ve noticed a serious drop in context awareness over the last week of the 4o model since the last full release of the 1o model. It like while they are saying how aware their new model is and how they are going to devote all their efforts to improving the new model, its like they forgot all their paying customers who still use 4o because all the functionality available for the 4o models is yet to be made available to 1o model.

I myself can’t precise the timeframe where all this started to happen but I believe it’s not entirely due to January updates.