Which AI model writes the most bugs in Go?

As of Nov 14, 2026, GPT-6.1 Sol had the highest relative bug rate in Go code (1.95, 95% more counted bugs than the Go average).

Updated Nov 14, 2026

Best AI model for Go code

As of Nov 14, 2026, Claude Sonnet 5.5 had the lowest relative bug rate in Go code (0.23, 77% fewer counted bugs than the Go average), among 5 ranked models.

Models ranked by relative bug rate in Go code. Lower values are better.
Rank	Model	Rate
1	Claude Sonnet 5.5	0.23
2	GPT-6 Astra	0.80
3= (statistically tied)	Claude Fable 5.1	1.26
4= (statistically tied)	Claude Opus 5.5	1.30
5	GPT-6.1 Sol	1.95

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

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Questions and answers

Which AI model writes the most bugs in Go?: As of Nov 14, 2026, GPT-6.1 Sol had the highest relative bug rate in Go code (1.95, 95% more counted bugs than the Go average).