Most of the time I pick the same Claude model I used last session, out of habit. So I built a small Claude Code mod that scores that habit.
It reads your first prompt, asks Haiku which model and effort the task needs, and shows a verdict beside the chat: on target, one step off, overshot or undershot. Each verdict comes with a short poster and a WHY box. The WHY box is the part I learn from.
The full post covers the rubric I use, how the mod is put together, what a model switch costs in cache terms, and a recipe you can paste into the Claude Desktop app to build your own. The cost numbers are my own estimates, so yours will differ.
Read the full post, with the recipe and the rubric: https://digitaldias.com/blog/2026-11-05-model-choice-is-a-bet/
