Benchmark Contamination
When a benchmark's questions and answers leak into a model's training data, inflating its score without real generalization.
e.g. A model scoring suspiciously high because MMLU questions appeared in its training data.MMLU, HumanEval, LLM-as-judge, regression suites, and production evaluation practices.
When a benchmark's questions and answers leak into a model's training data, inflating its score without real generalization.
e.g. A model scoring suspiciously high because MMLU questions appeared in its training data.A benchmark of 164 Python programming problems that tests whether a model's generated code passes automated unit tests.
e.g. Checking if a model's generated function correctly reverses a string.Using a capable LLM to score or compare other models' outputs on subjective criteria like helpfulness or coherence, in place of human review.
e.g. Asking a strong model to pick the better of two draft replies.A benchmark that measures a model's breadth of knowledge across 57 academic subjects using multiple-choice questions.
e.g. Comparing two models' general knowledge scores across law, medicine, and STEM.A code-generation metric measuring how often at least one of k sampled solutions passes all tests for a given problem.
e.g. pass@10 checks whether any of 10 sampled attempts solves the problem.A curated set of test prompts and expected behaviors run automatically after every change to catch broken behavior before it reaches production.
e.g. Re-running 200 saved prompts whenever a system prompt is edited.