← Evals & Launch Decisions / 09
hardNewAnthropicOpenAIGoogle DeepMind

Model B scores 83% and model A scores 80% on our eval. How many cases do we need before we believe B is better?

Try it in the practice workspaceDraft your answer before comparing it with the rubric.

Calculate the evidence needed for a small quality gain. Running both models on the same cases changes the test; the disagreement counts determine whether pairing saves evaluation work.

Updated Nov 2026 · Original practice questions with worked answers and teaching rubrics. Our editorial policy explains the sources, review process and limits.

Follow-up roundsAnswer first, then revise for each changed constraint
  1. Round 2. A pilot ran both models on 200 shared cases, and they disagreed on 9.
  2. Round 3. Model B costs 40% less. Product will accept up to a 1-point quality loss for that saving.

Calculate the evidence needed for a small quality gain. Running both models on the same cases changes the test; the disagreement counts determine whether pairing saves evaluation work.

free accounts read more answers per topic · no card
UP NEXT ON YOUR JOURNEY
NOTES & DISCUSSION · 0

No comments yet. How would you have answered?