Cursor Composer 2 vs Claude Opus 4.6 vs Sonnet 4.6 — The smartest dev tools just leveled up.
See which AI model actually codes, plans, and ships like a teammate—not just a chatbot.
Two flagship models, one month apart, trading benchmark leads across nine evaluations. GPT-5.4 is cheaper and broader. Claude Opus 4.6 writes better code and ranks #1 with real users. Here is exactly which one you should be using.
Cursor Composer 2 launched March 19, 2026 — beats Claude Opus 4.6 on Terminal-Bench 2.0 (61.7% vs 58.0%) at one-tenth the token cost. Here is what that actually means for your workflow.