There's a consensus that SOMETHING changed with Opus 4.5. It might have been the "merge rates" metric, it might have not.

I'm certainly getting faster and cleaner-looking solutions for certain issues on Opus 4.6 than I was 5 months ago, but I'm not sure about the ability to solve (or even weigh in) the actual hard stuff, i.e. the stuff I'm paid for.

And I'm definitely not sure about the supposed big step between 4.5 and 4.6. I'm literally not seeing any.