A thread you can test
Agent Evaluation
3 notes move from the word to a real choice at work — understand it first, then decide whether to use it.
Each note stands alone, or becomes the next step in this thread.
THE QUESTION THIS PAGE ANSWERS
ANSWER FIRSTWhat is Agent Evaluation, and which AI decisions does it change?
Without evals, fixing one bug creates three. Anthropic's Eval methodology This page keeps the related concepts, common mistakes, and practical notes in one reading thread.
First decide whether you are blocked by a definition, a choice, or verification; then choose the closest of the 3 notes below.
Start with “Why Evaluation Matters More Than Training,” then restate the conclusion using your own task.
Do not treat every method in a topic as interchangeable. The answer changes with the input, risk, and acceptance bar.
THIS QUESTION THREAD
Put the word back inside the choice it changes.
Why Evaluation Matters More Than Training
Without evals, fixing one bug creates three. Anthropic's Eval methodology
Three Graders: Code, Model, Human
Static assertions vs LLM-as-Judge vs human calibration — which fits which scenario
Eval Pitfalls: Noise, Cheating & Regression
Infra noise causes 6pp errors, models recognize tests, Prompt changes may drop Eval by 3%