> Well, first off there is no such thing as Claude as there are multiple models that you can select from.

Apologies, I assumed people would infer that I am referring to 3.5 sonnet.

> In my opinion the Claude 3.5 Sonnet model is spectacular.

Mine as well, until this morning.

> There was a small degradation in performance … 2 nights ago. It didn’t affect the quality of the responses I got…

Also same, but as of this morning the performance is fine but the quality seems to have gotten worse.

> This topic is discussed in recent Lex Fridman interview with with CEO of Anthropic where he very clearly walks through how these claims of it being dumber or not true

Could you elaborate on what was said?

I found the interview [1].

TL;DR they don’t change the weights, but they sometimes run A/B tests and modify the system prompt. The underlying model is very sensitive to changes. Even a small change can have broad impacts.

[1]: https://lexfridman.com/dario-amodei-transcript#chapter8_crit...