Cursor vs Windsurf
AI Agent Reliability Comparison
According to StupidLLM's incident database of 64 documented AI agent failures, Cursor has 5 incidents (avg severity 6.1/10) while Windsurf has 1 (avg severity 7.5/10).
Cursor
Top Failure Modes
Comparison Summary
| Metric | Cursor | Windsurf |
|---|---|---|
| Total Incidents | 5 | 1 |
| Avg Severity | 6.1/10 | 7.5/10 |
| Critical | 2 | 0 |
| Verified | 5 | 1 |
| Top Failure Mode | Infinite Loop | Ignored Instructions |
Frequently Asked Questions
Is Cursor or Windsurf more reliable?
Based on StupidLLM's incident database, Cursor has 5 documented failures (avg severity 6.1/10) while Windsurf has 1 (avg severity 7.5/10). Cursor shows better reliability.
What are the main differences between Cursor and Windsurf failures?
Cursor's most common failure mode is Infinite Loop, while Windsurf most commonly fails via Ignored Instructions. Cursor has 2 critical incidents vs Windsurf's 0.
Which has more critical-severity failures?
Cursor has more critical failures (2 vs 0), indicating a higher likelihood of severe, production-impacting incidents.
Should I use Cursor or Windsurf for production code?
Cursor has a lower average failure severity (6.1/10 vs 7.5/10), making it the statistically safer choice for production environments. However, both agents have documented critical incidents — no AI coding agent is risk-free.
How many verified incidents does each agent have?
Cursor has 5 verified incidents out of 5 total, while Windsurf has 1 verified out of 1. Verified incidents are confirmed against source evidence.