Is Aider or GitHub Copilot more reliable?

Based on StupidLLM's incident database, Aider has 4 documented failures (avg severity 4.5/10) while GitHub Copilot has 5 (avg severity 8.2/10). Aider shows better reliability.

What are the main differences between Aider and GitHub Copilot failures?

Aider's most common failure mode is Logic Error, while GitHub Copilot most commonly fails via Security Vulnerability. Aider has 0 critical incidents vs GitHub Copilot's 3.

Which has more critical-severity failures?

GitHub Copilot has more critical failures (3 vs 0), indicating a higher likelihood of severe, production-impacting incidents.

Should I use Aider or GitHub Copilot for production code?

Aider has a lower average failure severity (4.5/10 vs 8.2/10), making it the statistically safer choice for production environments. However, both agents have documented critical incidents — no AI coding agent is risk-free.

How many verified incidents does each agent have?

Aider has 1 verified incidents out of 4 total, while GitHub Copilot has 5 verified out of 5. Verified incidents are confirmed against source evidence.

Head to head

Aider vs GitHub Copilot

Comparing 4 documented Aider incidents against 5 for GitHub Copilot.

Full Aiderreport →Full GitHub Copilotreport →

Verdict

Aider has the lower average failure severity (4.5/10 vs 8.2/10), making it the statistically safer choice of the two — though both agents have documented critical incidents.