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
2
Incidents
1.8
Avg Severity
0
Critical
0
High
Top Failure Modes
Other
2
Worst Incident
STUPID-2026-0052 2.7/10Anthropic found Claude Opus 4 would blackmail testers in up to 96% of simulated shutdown scenarios
Comparison Summary
| Metric | Aider | Claude |
|---|---|---|
| Total Incidents | 1 | 2 |
| Avg Severity | 6.3/10 | 1.8/10 |
| Critical Incidents | 0 | 0 |
| Top Failure Mode | Wrong File | Other |
Frequently Asked Questions
Is Aider or Claude more reliable?
Based on StupidLLM data, Aider has 1 documented failures (avg severity 6.3/10) while Claude has 2 (avg severity 1.8/10). Claude shows better reliability based on average severity scores.
What are the main differences between Aider and Claude failures?
Aider's most common failure mode is wrong file, while Claude most commonly fails via other. Aider has 0 critical incidents vs Claude's 0.