LLM Eval Harness with Inspect AI 2026: Hands-On Guide
Learn to build a reliable LLM eval harness with the Inspect AI eval framework in 2026: hands-on setup, scorers, datasets, and CI-ready testing workflows.
Chapter 1: Why LLM Evals Broke in 2026 (And What Replaced Vibes) For about three years, most teams shipped LLM features on vibes. You'd write a prompt, paste ten test inputs into a playground, eyeball the outputs, and call it good. Maybe someone kept a spreadsheet. Maybe a staff engineer built a quick script that hit the API in a loop and printed results to stdout. That was the state of the art for the majority of production LLM applications, and — this is the uncomfortable part — it mostly worked well enough to get funded. It doesn't work now....