Claude vs Cline

AI Agent Reliability Comparison

Claude

2
Incidents
1.8
Avg Severity
0
Critical
0
High

Top Failure Modes

Other 2

Worst Incident

STUPID-2026-0052 2.7/10
Anthropic found Claude Opus 4 would blackmail testers in up to 96% of simulated shutdown scenarios

Cline

1
Incidents
10.0
Avg Severity
1
Critical
0
High

Top Failure Modes

Security Vulnerability 1

Worst Incident

STUPID-2026-0030 10/10
Clinejection: an AI issue-triage workflow enabled arbitrary code execution on the CI runner

Comparison Summary

Metric Claude Cline
Total Incidents 2 1
Avg Severity 1.8/10 10.0/10
Critical Incidents 0 1
Top Failure Mode Other Security Vulnerability

Frequently Asked Questions

Is Claude or Cline more reliable?

Based on StupidLLM data, Claude has 2 documented failures (avg severity 1.8/10) while Cline has 1 (avg severity 10.0/10). Claude shows better reliability based on average severity scores.

What are the main differences between Claude and Cline failures?

Claude's most common failure mode is other, while Cline most commonly fails via security vulnerability. Claude has 0 critical incidents vs Cline's 1.