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
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 | Claude Cowork | Manus |
|---|---|---|
| Total Incidents | 1 | 1 |
| Avg Severity | 10.0/10 | 7.5/10 |
| Critical Incidents | 1 | 0 |
| Top Failure Mode | Destructive Action | Security Vulnerability |
Frequently Asked Questions
Is Claude Cowork or Manus more reliable?
Based on StupidLLM data, Claude Cowork has 1 documented failures (avg severity 10.0/10) while Manus has 1 (avg severity 7.5/10). Manus shows better reliability based on average severity scores.
What are the main differences between Claude Cowork and Manus failures?
Claude Cowork's most common failure mode is destructive action, while Manus most commonly fails via security vulnerability. Claude Cowork has 1 critical incidents vs Manus's 0.