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
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 | Sakana Ai Scientist |
|---|---|---|
| Total Incidents | 2 | 1 |
| Avg Severity | 1.8/10 | 2.0/10 |
| Critical Incidents | 0 | 0 |
| Top Failure Mode | Other | Ignored Instructions |
Frequently Asked Questions
Is Claude or Sakana Ai Scientist more reliable?
Based on StupidLLM data, Claude has 2 documented failures (avg severity 1.8/10) while Sakana Ai Scientist has 1 (avg severity 2.0/10). Claude shows better reliability based on average severity scores.
What are the main differences between Claude and Sakana Ai Scientist failures?
Claude's most common failure mode is other, while Sakana Ai Scientist most commonly fails via ignored instructions. Claude has 0 critical incidents vs Sakana Ai Scientist's 0.