thinQmaster Virtual testing partner Adaptive practice exams that find your weak spots and drill them. Every answer explained. From $69
Enroll

thinQmaster

Find your exam

Five questions free, before you decide.

Step 1 · choose a vendor

In one of our camps? Your practice exams come with the tuition — they are on your study page already.

AI & Machine Learning · Intermediate

BLEU

Bilingual Evaluation Understudy: a metric scoring generated text by n-gram precision overlap with reference text.

Definition

BLEU was designed for machine translation and compares candidate n-grams against one or more references, with a brevity penalty. Scores range from 0 to 1 (often shown 0-100). It rewards surface overlap and misses valid paraphrases.

Exam tip

BLEU is the translation metric; ROUGE is the summarization metric.

Related terms