kapynAI / Models

Claude Opus 4.8: "a modest but tangible improvement"

Claude Opus 4.8 is a modest but tangible improvement in honesty and accuracy. The latest version is four times less likely to overlook flaws in generated code and abstains more often on uncertain questions, reducing hallucination rates. Pricing remains the same as previous versions.

Simon Willison·May 28, 2026

Opening Kapyn…