How to Create Your Own Personal AI Benchmark

Every's head of evals explains how to build a personal AI benchmark instead of relying on MMLU-Pro and other public tests, drawing on his own experience testing Claude Opus 5, Claude Fable 5, GPT-5.6 Sol, Astra, Luna and Haiku on real work tasks. The approach has three levels and is meant to show when to switch models and whether a smaller, cheaper one suffices.