Claude Code
8
Incidents
6.4
Avg Severity
3
Critical
2
High
Top Failure Modes
Destructive Action
3
Other
2
Security Vulnerability
2
Worst Incident
STUPID-2026-0003 10/10Claude Code ran rm -rf on test fixtures thinking they were temp files
Github Copilot
4
Incidents
10.0
Avg Severity
4
Critical
0
High
Top Failure Modes
Security Vulnerability
4
Worst Incident
STUPID-2026-0004 10/10Copilot autocompleted AWS credentials into public repository
Comparison Summary
| Metric | Claude Code | Github Copilot |
|---|---|---|
| Total Incidents | 8 | 4 |
| Avg Severity | 6.4/10 | 10.0/10 |
| Critical Incidents | 3 | 4 |
| Top Failure Mode | Destructive Action | Security Vulnerability |
Frequently Asked Questions
Is Claude Code or Github Copilot more reliable?
Based on StupidLLM data, Claude Code has 8 documented failures (avg severity 6.4/10) while Github Copilot has 4 (avg severity 10.0/10). Claude Code shows better reliability based on average severity scores.
What are the main differences between Claude Code and Github Copilot failures?
Claude Code's most common failure mode is destructive action, while Github Copilot most commonly fails via security vulnerability. Claude Code has 3 critical incidents vs Github Copilot's 4.