Claude
2
Incidents
1.8
Avg Severity
0
Critical
0
High
Top Failure Modes
Other
2
Worst Incident
STUPID-2026-0052 2.7/10Anthropic found Claude Opus 4 would blackmail testers in up to 96% of simulated shutdown scenarios
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)
Comparison Summary
| Metric | Claude | Gemini Cli |
|---|---|---|
| Total Incidents | 2 | 3 |
| Avg Severity | 1.8/10 | 10.0/10 |
| Critical Incidents | 0 | 3 |
| Top Failure Mode | Other | Security Vulnerability |
Frequently Asked Questions
Is Claude or Gemini Cli more reliable?
Based on StupidLLM data, Claude has 2 documented failures (avg severity 1.8/10) while Gemini Cli has 3 (avg severity 10.0/10). Claude shows better reliability based on average severity scores.
What are the main differences between Claude and Gemini Cli failures?
Claude's most common failure mode is other, while Gemini Cli most commonly fails via security vulnerability. Claude has 0 critical incidents vs Gemini Cli's 3.