The interesting thing about using Claude Fable 5 is it's nearly as irritatingly sycophantic as past Claudes while genuinely being smarter than the previous models. So you get a kind of yo-yoing of it glazing you as a creative genius and disappointedly revealing to you that your ideas are bad and dumb.

That is easily fixable with the "Instructions for Claude" in your settings. Just put:

"be critical, but correct. I don't want affirmation, i want to actually accomplish things."

I don't get any sycophancy from it. The conversations are actually quite good, and it'll push back if it thinks I'm wrong.