Cline vs Github Copilot
AI Agent Reliability Comparison
According to StupidLLM's incident database of 64 documented AI agent failures, Cline has 1 incidents (avg severity 10.0/10) while Github Copilot has 4 (avg severity 10.0/10). Here's how these two AI coding agents compare on reliability, failure modes, and real-world risk.
Cline
Top Failure Modes
Worst Incident
STUPID-2026-0030 10/10Github Copilot
Top Failure Modes
Worst Incident
STUPID-2026-0004 10/10Comparison Summary
| Metric | Cline | Github Copilot |
|---|---|---|
| Total Incidents | 1 | 4 |
| Avg Severity | 10.0/10 | 10.0/10 |
| Critical Incidents | 1 | 4 |
| Top Failure Mode | Security Vulnerability | Security Vulnerability |
Frequently Asked Questions
Is Cline or Github Copilot more reliable?
Based on StupidLLM's incident database, Cline has 1 documented failures (avg severity 10.0/10) while Github Copilot has 4 (avg severity 10.0/10). Both agents show similar reliability profiles.
What are the main differences between Cline and Github Copilot failures?
Cline's most common failure mode is security vulnerability, while Github Copilot most commonly fails via security vulnerability. Cline has 1 critical incidents vs Github Copilot's 4.
Which has more critical-severity failures?
Github Copilot has more critical failures (4 vs 1), indicating a higher likelihood of severe, production-impacting incidents.
What is the most dangerous failure mode for Cline?
Cline's most frequent failure mode is security vulnerability — its worst documented incident (STUPID-2026-0030) was rated 10/10 severity. Understanding these failure patterns helps teams decide whether Cline is safe for their specific use case.
What is the most dangerous failure mode for Github Copilot?
Github Copilot's most frequent failure mode is security vulnerability — its worst documented incident (STUPID-2026-0004) was rated 10/10 severity. Understanding these failure patterns helps teams decide whether Github Copilot is safe for their specific use case.
Should I use Cline or Github Copilot for production code?
Both agents have similar severity profiles. Your choice should depend on which failure modes are more tolerable for your stack — Cline tends to fail via security vulnerability, while Github Copilot fails more often via security vulnerability.
How many verified incidents does each agent have?
Cline has 1 verified incidents out of 1 total, while Github Copilot has 4 verified out of 4. Verified incidents are confirmed against source evidence (GitHub PRs, bug reports, news articles), making them the most reliable data points in StupidLLM's database.
How does Cline compare to other AI agents?
StupidLLM tracks 27 AI coding agents. Cline has 1 documented failures — placing it among the higher-risk agents in the database. See the full comparison matrix for context against all tracked agents.
How does Github Copilot compare to other AI agents?
StupidLLM tracks 27 AI coding agents. Github Copilot has 4 documented failures — placing it among the higher-risk agents in the database. See the full comparison matrix for context against all tracked agents.