Gemini Cli
3
Incidents
10.0
Avg Severity
3
Critical
0
High
Top Failure Modes
Security Vulnerability
1
Scope Explosion
1
Destructive Action
1
Worst Incident
STUPID-2026-0027 10/10Gemini CLI silently executed arbitrary code from an untrusted repo (CVE-2026-12537, CVSS 10.0)
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 | Gemini Cli | Github Copilot |
|---|---|---|
| Total Incidents | 3 | 4 |
| Avg Severity | 10.0/10 | 10.0/10 |
| Critical Incidents | 3 | 4 |
| Top Failure Mode | Security Vulnerability | Security Vulnerability |
Frequently Asked Questions
Is Gemini Cli or Github Copilot more reliable?
Based on StupidLLM data, Gemini Cli has 3 documented failures (avg severity 10.0/10) while Github Copilot has 4 (avg severity 10.0/10). Both agents show similar reliability profiles.
What are the main differences between Gemini Cli and Github Copilot failures?
Gemini Cli's most common failure mode is security vulnerability, while Github Copilot most commonly fails via security vulnerability. Gemini Cli has 3 critical incidents vs Github Copilot's 4.