Cursor Bugbot now on Composer 2.5: 3× faster, cheaper

What's new

• 3× faster: average review ~90 s (down from ~5 min), 90 % of runs under 3 min
• +10 % more bugs on default-effort runs (0.62 vs 0.56 bugs/review)
• −22 % cost per run at the same accuracy
• Composer 2.5 as the new backend model (previously Composer 2)
• /review command enables pre-push review directly from a local Cursor session
• Bugbot detects duplicate diffs → no double-charging when the same diff arrives as a PR

Why it matters

Bugbot was the slowest part of the Cursor PR flow. ~90 s means you can call /review right before git push without blocking merges. For monorepo teams the 22 % savings matter at hundreds of PRs/day.

How to try it

In the Cursor agent window type /review before git push; the repo must have Bugbot integration enabled (Settings → Integrations → Bugbot). You don't need to change existing configs — Composer 2.5 rolls out automatically.