FWIW, I notice the intelligence drop drastically with long contexts with Opus 4.6. It's barely usable for anything intricate and long. That long window is good for _something_, but it's not as good as a short window.
Oh yeah, that's a use case I love long contexts for. "Here's a day of prod logs, what's broken?" It's an incredible utility, but the qualities much less than with shorter contexts, and you see it much more apparently when you do similar coding tasks with progressively larger windows.
