Codex 5.5 is really easy to use, and the improvement over 5.4 is not just a little, the sense of enhancement is very obvious. More importantly, the response speed has also increased significantly, not just "smarter," but the overall experience is smoother. As for domestic large models, I won't say much, but they are basically left far behind. I haven't used Opus 4.7 much recently, but based on the current feel, Codex 5.5 even feels better than the experience I had with 4.6 before.