Which AI model writes the most bugs in Java?

The lowest and highest relative bug rates in Java code are statistically tied, so no ranked model clearly had the most counted bugs.

Updated Sep 30, 2026

Best AI model for Java code

As of Sep 30, 2026, Claude Opus 4.8 had the lowest relative bug rate in Java code (0.00, 100% fewer counted bugs than the Java average), statistically tied with Claude Opus 5, among 2 ranked models.

Models ranked by relative bug rate in Java code. Lower values are better.
Rank	Model	Rate
1= (statistically tied)	Claude Opus 4.8	0.00
2= (statistically tied)	Claude Opus 5	0.00

1.00 = Java average · lower is better · = statistically tied

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Questions and answers

Which AI model writes the most bugs in Java?: The lowest and highest relative bug rates in Java code are statistically tied, so no ranked model clearly had the most counted bugs.