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
Claude Cowork
1
Incidents
10.0
Avg Severity
1
Critical
0
High
Top Failure Modes
Destructive Action
1
Worst Incident
STUPID-2026-0043 10/10Claude Cowork deleted 15 years of family photos when asked only to tidy temporary Office files
Comparison Summary
| Metric | Aider | Claude Cowork |
|---|---|---|
| Total Incidents | 1 | 1 |
| Avg Severity | 6.3/10 | 10.0/10 |
| Critical Incidents | 0 | 1 |
| Top Failure Mode | Wrong File | Destructive Action |
Frequently Asked Questions
Is Aider or Claude Cowork more reliable?
Based on StupidLLM data, Aider has 1 documented failures (avg severity 6.3/10) while Claude Cowork has 1 (avg severity 10.0/10). Aider shows better reliability based on average severity scores.
What are the main differences between Aider and Claude Cowork failures?
Aider's most common failure mode is wrong file, while Claude Cowork most commonly fails via destructive action. Aider has 0 critical incidents vs Claude Cowork's 1.