The worst part of Opus that I dont like is they control what you can/can't do. the guardrails that they do in the name of interpretability where you steer you. Last couple of days I was working a project that supports bunch of models and the model said only Claude can do it start writing code that doesn't work with codex, opencode, pi etc. Finally, when I switched to Codex, everything worked. To me, they are controlling the narrative. This is Opus 4.8 vs GPT 5.5.

I can't believe I would say this. I TRUST OpenAI more than Anthropic. They try to play best actor but they are manipulating the behavior of the model in the name of guardrails/interpretability.

That is why I refuse to build anything that works with Anthropic models as the backend. Because, when they want to shut you off, they can do it by just making model less reliable in your product than their offering!