Devin
12
Incidents
4.9
Avg Severity
3
Critical
0
High
Top Failure Modes
Scope Explosion
2
Destructive Action
2
Infinite Loop
2
Worst Incident
STUPID-2026-0001 10/10Devin deleted all migration files during auth refactor
Manus
1
Incidents
7.5
Avg Severity
0
Critical
1
High
Top Failure Modes
Security Vulnerability
1
Worst Incident
STUPID-2026-0063 7.5/10Manus AI leaked its own system prompt when a user simply asked it to read its internal directory
Comparison Summary
| Metric | Devin | Manus |
|---|---|---|
| Total Incidents | 12 | 1 |
| Avg Severity | 4.9/10 | 7.5/10 |
| Critical Incidents | 3 | 0 |
| Top Failure Mode | Scope Explosion | Security Vulnerability |
Frequently Asked Questions
Is Devin or Manus more reliable?
Based on StupidLLM data, Devin has 12 documented failures (avg severity 4.9/10) while Manus has 1 (avg severity 7.5/10). Devin shows better reliability based on average severity scores.
What are the main differences between Devin and Manus failures?
Devin's most common failure mode is scope explosion, while Manus most commonly fails via security vulnerability. Devin has 3 critical incidents vs Manus's 0.