Is Aider or Claude Code more reliable?

Based on StupidLLM's incident database, Aider has 4 documented failures (avg severity 4.5/10) while Claude Code has 29 (avg severity 7.3/10). Aider shows better reliability.

What are the main differences between Aider and Claude Code failures?

Aider's most common failure mode is Logic Error, while Claude Code most commonly fails via Destructive Action. Aider has 0 critical incidents vs Claude Code's 9.

Which has more critical-severity failures?

Claude Code has more critical failures (9 vs 0), indicating a higher likelihood of severe, production-impacting incidents.

Should I use Aider or Claude Code for production code?

Aider has a lower average failure severity (4.5/10 vs 7.3/10), 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 Claude Code has 28 verified out of 29. Verified incidents are confirmed against source evidence.

Head to head

Aider vs Claude Code

Comparing 4 documented Aider incidents against 29 for Claude Code.

Full Aiderreport →Full Claude Codereport →

Verdict

Aider has the lower average failure severity (4.5/10 vs 7.3/10), making it the statistically safer choice of the two — though both agents have documented critical incidents.