Aider
1
Incidents
6.3
Avg Severity
0
Critical
0
High
Top Failure Modes
Wrong File
1
Worst Incident
STUPID-2026-0005 6.3/10Aider modified wrong file — edited production config instead of dev config
Windsurf
1
Incidents
7.5
Avg Severity
0
Critical
1
High
Top Failure Modes
Ignored Instructions
1
Worst Incident
STUPID-2026-0007 7.5/10Windsurf ignored .gitignore and committed node_modules and .env
Comparison Summary
| Metric | Aider | Windsurf |
|---|---|---|
| Total Incidents | 1 | 1 |
| Avg Severity | 6.3/10 | 7.5/10 |
| Critical Incidents | 0 | 0 |
| Top Failure Mode | Wrong File | Ignored Instructions |
Frequently Asked Questions
Is Aider or Windsurf more reliable?
Based on StupidLLM data, Aider has 1 documented failures (avg severity 6.3/10) while Windsurf has 1 (avg severity 7.5/10). Aider shows better reliability based on average severity scores.
What are the main differences between Aider and Windsurf failures?
Aider's most common failure mode is wrong file, while Windsurf most commonly fails via ignored instructions. Aider has 0 critical incidents vs Windsurf's 0.