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
Claude Cowork
1
Incidents
10.0
Avg Severity
1
Critical
0
High
Top Failure Modes
Destructive Action
1
Worst Incident
STUPID-2026-0043 10/10Claude Cowork deleted 15 years of family photos when asked only to tidy temporary Office files
Comparison Summary
| Metric | Amazon Kiro | Claude Cowork |
|---|---|---|
| Total Incidents | 1 | 1 |
| Avg Severity | 10.0/10 | 10.0/10 |
| Critical Incidents | 1 | 1 |
| Top Failure Mode | Destructive Action | Destructive Action |
Frequently Asked Questions
Is Amazon Kiro or Claude Cowork more reliable?
Based on StupidLLM data, Amazon Kiro has 1 documented failures (avg severity 10.0/10) while Claude Cowork has 1 (avg severity 10.0/10). Both agents show similar reliability profiles.
What are the main differences between Amazon Kiro and Claude Cowork failures?
Amazon Kiro's most common failure mode is destructive action, while Claude Cowork most commonly fails via destructive action. Amazon Kiro has 1 critical incidents vs Claude Cowork's 1.