# Side-by-side eval

An eval that compares the outputs of two or more models or systems next to each other to judge which is better.

Blind comparison, where you hide which model produced which output, is one of the most effective ways to remove your personal bias toward certain models. Side-by-side comparisons also show quickly which output fits your preferences.

Also called: Side-by-side evaluation, Pairwise comparison, A/B comparison

Kind of: Eval

Often confused with: A/B test

Source: https://redfinchadvisory.com/lexicon/side-by-side-eval (version 1.0, changed 2026-10-21)