Which AI model writes the most bugs in Terraform?

As of Nov 14, 2026, Claude Opus 5.5 had the highest relative bug rate in Terraform code (0.94, 6% fewer counted bugs than the Terraform average), statistically tied with Claude Fable 5.1.

Updated Nov 14, 2026

Best AI model for Terraform code

As of Nov 14, 2026, GPT-6 Astra had the lowest relative bug rate in Terraform code (0.43, 57% fewer counted bugs than the Terraform average), statistically tied with Claude Fable 5.1, among 3 ranked models.

Models ranked by relative bug rate in Terraform code. Lower values are better.
Rank	Model	Rate
1= (statistically tied)	GPT-6 Astra	0.43
2= (statistically tied)	Claude Fable 5.1	0.82
3= (statistically tied)	Claude Opus 5.5	0.94

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

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Questions and answers

Which AI model writes the most bugs in Terraform?: As of Nov 14, 2026, Claude Opus 5.5 had the highest relative bug rate in Terraform code (0.94, 6% fewer counted bugs than the Terraform average), statistically tied with Claude Fable 5.1.