I'm using it today in Cursor and it is so bad. Honestly. It's only trouble. Sorry to say that but right now in Cursor it is super bad. Don't know why. I'm using it for normal stuff. Not some special extra extra.
Switched back to GPT-5.4 and all was good again. Hm.
Introducing Claude Opus 4.7, our most capable Opus model yet.
It handles long-running tasks with more rigor, follows instructions more precisely, and verifies its own outputs before reporting back.
You can hand off your hardest work with less supervision.