Which AI model writes the most bugs in Svelte?

As of Nov 14, 2026, GPT-6 Astra had the highest relative bug rate in Svelte code (2.24, 124% more counted bugs than the Svelte average).

Updated Nov 14, 2026

Best AI model for Svelte code

As of Nov 14, 2026, Claude Opus 5.5 had the lowest relative bug rate in Svelte code (0.69, 31% fewer counted bugs than the Svelte average), among 2 ranked models.

Models ranked by relative bug rate in Svelte code. Lower values are better.
Rank	Model	Rate
1	Claude Opus 5.5	0.69
2	GPT-6 Astra	2.24

1.00 = Svelte average · lower is better

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Questions and answers

Which AI model writes the most bugs in Svelte?: As of Nov 14, 2026, GPT-6 Astra had the highest relative bug rate in Svelte code (2.24, 124% more counted bugs than the Svelte average).