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Pronounced: /M-M-L-U/
Massive Multitask Language Understanding is a benchmark covering 57 subjects from elementary mathematics to professional law. Each item is a multiple-choice question, and a language model is graded on accuracy. MMLU has become a default headline number on most frontier model release announcements.
MMLU appears in nearly every model card and capability claim. Knowing its limits and its history of contamination is part of literate AI evaluation.
Massive Multitask Language Understanding is a benchmark covering 57 subjects from elementary mathematics to professional law. Each item is a multiple-choice question, and a language model is graded on accuracy. MMLU has become a default headline number on most frontier model release announcements.
MMLU appears in nearly every model card and capability claim. Knowing its limits and its history of contamination is part of literate AI evaluation.
Definitions are original explanations written for career development purposes. For authoritative technical definitions, refer to NIST, ISO, or the relevant standards body.
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