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Data Quality

Source
scale.com
Author
Scale AI blog
Date
Why it matters

Shows a production pattern for review: tune judge prompts against a calibration set of human-approved examples, keep humans on edge cases, and analyze failure patterns instead of only scoring.

Key takeaways · AI-distilled
  • Scale says the labs it works with accept 97% of its data on the first pass, backed by three review levels: task-level checks of each annotation, dataset-level evaluation of training value, and contributor-level assessment of annotators.
  • Scale's Archie system uses AI agents as judges of each annotation against project rules, with human experts on edge cases. Scale requires it to match expert human reviewers on pre-delivery checks before deployment.
  • Archie tunes its judge prompts through auto-hillclimbing, iteratively testing them against a dataset of ideal examples, and generates reports that summarize common failure modes rather than only scoring.
  • Scale's dataset-level framework combines diversity, relevance, difficulty and generalization metrics, including reward-hacking detection, into a composite score meant to predict a dataset's impact on a model before training.
  • Contributor checks estimate the likelihood a response was -generated, flag anomalous interaction patterns and filter gibberish, while a fit model matches annotators to projects and moves them to harder work as they show ability.
Terms in this piece · Glossary
  • AI agent — An AI system that doesn't just answer once but works toward a goal in a loop — taking actions, reading the results, and deciding what to do next.
  • calibration — How well a model's confidence matches reality — a calibrated model saying "90% sure" is right about 90% of the time.
  • LLM-as-judge — Using one model to score another's output against a rubric, so quality can be measured at a scale human grading cannot reach.
  • LLM — A large language model — the neural network behind tools like Claude and ChatGPT, trained on huge amounts of text to predict what comes next.
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