kapynAI / Models

Claude Fable is relentlessly proactive

Claude Fable 5 is a new LLM exhibiting relentlessly proactive problem-solving. It effectively uses its extensive capabilities to achieve goals, demonstrated by its ability to diagnose a UI bug by inspecting project dependencies. This proactive nature and deep inspection capability make it a powerful tool for developers debugging complex codebases.

Simon Willison·Jun 11, 2026

Opening Kapyn…