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
Microsoft Copilot
1
Incidents
10.0
Avg Severity
1
Critical
0
High
Top Failure Modes
Security Vulnerability
1
Worst Incident
STUPID-2026-0051 10/10EchoLeak: a zero-click email silently exfiltrated data from Microsoft 365 Copilot (CVE-2025-32711, CVSS 9.3)
Comparison Summary
| Metric | Aider | Microsoft Copilot |
|---|---|---|
| Total Incidents | 1 | 1 |
| Avg Severity | 6.3/10 | 10.0/10 |
| Critical Incidents | 0 | 1 |
| Top Failure Mode | Wrong File | Security Vulnerability |
Frequently Asked Questions
Is Aider or Microsoft Copilot more reliable?
Based on StupidLLM data, Aider has 1 documented failures (avg severity 6.3/10) while Microsoft Copilot has 1 (avg severity 10.0/10). Aider shows better reliability based on average severity scores.
What are the main differences between Aider and Microsoft Copilot failures?
Aider's most common failure mode is wrong file, while Microsoft Copilot most commonly fails via security vulnerability. Aider has 0 critical incidents vs Microsoft Copilot's 1.