GPT-5.5 vs Anthropic’s Methods Model vs Opus 4.7: What Actually Matters

We are well past the point where asking, which model is best? gets you a useful answer. The more interesting question now is this: which kind of model behavior do you actually need? That is why the current comparison between OpenAI’s GPT-5.5, Anthropic’s methods-oriented direction, and Claude Opus 4.7 matters. These are not just three interchangeable frontier models fighting over benchmark points. They represent different bets about how serious AI work gets done. My short version is simple. GPT-