Amazon Kiro
1
Incidents
10.0
Avg Severity
1
Critical
0
High
Top Failure Modes
Destructive Action
1
Worst Incident
STUPID-2026-0046 10/10Amazon's Kiro agent deleted production, causing a 13-hour AWS outage and ~6.3M lost Amazon.com orders
Devin
12
Incidents
4.9
Avg Severity
3
Critical
0
High
Top Failure Modes
Scope Explosion
2
Destructive Action
2
Infinite Loop
2
Worst Incident
STUPID-2026-0001 10/10Devin deleted all migration files during auth refactor
Comparison Summary
| Metric | Amazon Kiro | Devin |
|---|---|---|
| Total Incidents | 1 | 12 |
| Avg Severity | 10.0/10 | 4.9/10 |
| Critical Incidents | 1 | 3 |
| Top Failure Mode | Destructive Action | Scope Explosion |
Frequently Asked Questions
Is Amazon Kiro or Devin more reliable?
Based on StupidLLM data, Amazon Kiro has 1 documented failures (avg severity 10.0/10) while Devin has 12 (avg severity 4.9/10). Devin shows better reliability based on average severity scores.
What are the main differences between Amazon Kiro and Devin failures?
Amazon Kiro's most common failure mode is destructive action, while Devin most commonly fails via scope explosion. Amazon Kiro has 1 critical incidents vs Devin's 3.