In this article, you will learn how to evaluate LLM applications using the three dominant open-source frameworks — RAGAS, DeepEval, and Promptfoo — and why the LLM-as-a-judge mechanism they all rely on has measurable biases you need to actively design around.

LLM Evaluation System Prompts Scored Rubrics Runtime Guardrails: A Practical Guide for...

In this article, you will learn how to evaluate LLM applications using the three dominant open-source frameworks — RAGAS, DeepEval, and Promptfoo — and why the LLM-as-a-judge…

A design pattern for LLM-as-judge: collect evidence with binary Yes/No checks, pick one named verdict holistically, and never aggregate into a score. With a copy-paste judge…

One weekend I wrote an LLM eval framework in about two hundred lines of Python. It demoed...