Opus 4.6 was never nerfed, that's FUD. There were harness-level problems that were fixed.

4.7 is much better. But perception is a funny thing, once you think something is bad you start looking for it everywhere.

Still anecdotal but the exact same coding task on the exact same repo (I clone from GitHub templates for projects) worked amazingly well in December with CC/Opus, couldn’t accomplish the goal anymore end of march, with essentially identical prompts, and 4.7 was just comically useless. But even these days I tried repeatedly and 4.6 still can’t do the thing it could in December.

Did you even use it? It was nerfed to hell and back. It stopped following instructions, forgot what sub-agents responded and so on. Stop spreading this pro-Anthropic narrative. They did a rug pull due to lack of compute.