I strongly disagree. I'm working on a semantic model for Lojban, heavily AI assisted, using multiple models. I have basically all popular frontier models doing research and panel debates. Astra and Fable are both noticeably ahead of everything else including their previous iterations. When it comes to reviews, they can also find more issues in others (or even their own) code.

I'm sure that's part of it, but I run it side by side in my review bot, and Astra medium effort consistently catches more issues than Sol 5.6, using fewer tokens.

For coding it's a little harder to tell, but at least the prose feels a little better.