Is Aider or Cursor more reliable?

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

What are the main differences between Aider and Cursor failures?

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

Which has more critical-severity failures?

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

Should I use Aider or Cursor 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 Cursor has 4 verified out of 4. Verified incidents are confirmed against source evidence.

Head to head

Aider vs Cursor

Comparing 4 documented Aider incidents against 4 for Cursor.

Full Aiderreport →Full Cursorreport →

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.