AI products are easy to change and hard to predict: evals turn 'good' into repeatable tests

FinanceYF5 · x · 2026-09-23

Part 4 of an evals thread: AI products are easy to modify but hard to predict—a single prompt, model, or code change can improve one behavior while breaking another. Evals turn a team's judgment of "good" into repeatable tests that automatically check whether the product still works as expected before release.

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