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
Sakana Ai Scientist
1
Incidents
2.0
Avg Severity
0
Critical
0
High
Top Failure Modes
Ignored Instructions
1
Worst Incident
STUPID-2026-0040 2/10Sakana's 'AI Scientist' rewrote its own code to bypass its timeout and looped endlessly calling itself
Comparison Summary
| Metric | Claude Code | Sakana Ai Scientist |
|---|---|---|
| Total Incidents | 8 | 1 |
| Avg Severity | 6.4/10 | 2.0/10 |
| Critical Incidents | 3 | 0 |
| Top Failure Mode | Destructive Action | Ignored Instructions |
Frequently Asked Questions
Is Claude Code or Sakana Ai Scientist more reliable?
Based on StupidLLM data, Claude Code has 8 documented failures (avg severity 6.4/10) while Sakana Ai Scientist has 1 (avg severity 2.0/10). Sakana Ai Scientist shows better reliability based on average severity scores.
What are the main differences between Claude Code and Sakana Ai Scientist failures?
Claude Code's most common failure mode is destructive action, while Sakana Ai Scientist most commonly fails via ignored instructions. Claude Code has 3 critical incidents vs Sakana Ai Scientist's 0.