Slides: Evals 101 — Doug Guthrie, Braintrust

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How evals can help your business

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What is an Eval?

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Datasets - Tips

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Scorer Types

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Scorer Tips

Use a higher-quality model for scoring, even if the prompt uses a cheaper

model. Scorers benefit from better reasoning and nuance.

Treat scorers like judges: evaluate intent match, style accuracy, and

overall output quality: -not just correctness.

Break scoring into multiple focused scorers (e.g., accuracy, Creativity,

formatting) to pinpoint issues.

Test scorer prompts in the Playground before use. Try strong and weak

outputs to refine scoring reliability.

Avoid overloading the scorer prompt with context. Focus if on the relevant

input and output for fair, consistent evaluation.

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BRAINTRUST.DEV

Playgrounds

Experiments

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