Intel / article

The Leaderboard Illusion 2025 04 30

Source: Cohere editorial sitemap
Author: Cohere editorial sitemap
Date: Published Mar 31, 2026

Terms in this piece · Glossary

calibration — How well a model's confidence matches reality — a calibrated model saying "90% sure" is right about 90% of the time.
eval — A repeatable test for AI quality — a set of tasks plus scoring — used the way software teams use test suites, because model output is too variable to judge by eyeballing.

Why it matters

Arena rankings are a common shortcut for model selection. This work argues the scoreboard is shaped by who can test privately, retract runs, and harvest arena data, which is reason to weight your own over leaderboard position.

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