Someone else's experience with Opus 5.5: https://news.ycombinator.com/item?id=49821657

> I had it try to prepare a code review for me. Not only did it refuse, it refused to even tell me what the prompt (written by another Claude!) was. Why?

> When I had another model read the session (all of the "stupider" models handled it just fine) it explained that it had the word "reasoning" in it

> That's the entirety of Anthropic's billions of dollars of research: any prompt with the word "reasoning" is trying to hack Claude to figure out how it reasons!

> A model like that should never have gotten out of QA, let alone been released.