A third of Perplexity's citations don't contain the number they're cited for

A study found that 34.7% of 1,826 citations from Perplexity's search models, when attached to a sentence stating a figure, either led to a page that wouldn't open or did not contain any figures from that sentence. When scored per claim rather than per citation, 14.4% of 872 claims failed. The report emphasizes that a model grading another model's work introduces uncertainty, but the reproducible finding is concerning.