Very very hard to believe.

*the api wasn't nerfed. ChatGPT4 was most certainly changed

The comments seem to conclude that it was actually nerfed just not the API.

It most certainly was, despite what anyone from openai says. It’s not working the same.

It most definitely was. The chat output of GPT4 is much faster now and much worse quality. If you go in the playground and use the March 14 api (as opposed to the default GPT4 API) it is high quality and slow. Yes, there are two GPT4 API endpoints .

Prob. referring to this https://news.ycombinator.com/item?id=36134249

maybe the comment was about safety related training leading to performance loss. Sebastien used the "Unicorn benchmark" to visualize such nerfing. Watch his talk at timestamp 26:22. Ref: https://youtu.be/qbIk7-JPB2c?t=1582