kapynAI / Models

Claude Opus 4.8: "a modest but tangible improvement"

Claude Opus 4.8 is a modest but tangible LLM improvement. The update enhances honesty by making the model four times less likely to overlook flaws in its generated code and more prone to flagging uncertainties, a direct measure of reduced hallucination. Anthropic is also working on models offering similar capabilities at a lower cost, with pricing unchanged at $5/million input and $25/million output.

Simon Willison·May 28, 2026

Opening Kapyn…