bisica ResearchStudies and charts from the questions bisica asks ChatGPT, Claude, Perplexity and Google every month, with the method, every question and the data.https://bisica.com/research/2026-11-12T09:00:00-05:00bisica ResearchClaude’s answers named more of the brands we track than Perplexity’s in all 15 categorieshttps://bisica.com/research/claude-and-perplexity/2026-11-12T09:00:00-05:002026-11-12T09:00:00-05:00We asked both tools the same 300 shopper questions on November 1. The typical Claude answer ran nearly three times as long as Perplexity’s. Claude’s answers named the most of the brands we track in 13 of 15 categories and Perplexity’s the fewest in 14. Counted per word, Perplexity named the brands we track most often and Claude least often. SoFi came up in 12 of 20 Claude answers about banking apps and 2 of 20 Perplexity answers.Two in three of 150 consumer brands came up in fewer than one in four AI shopping answershttps://bisica.com/research/150-brands/2026-11-10T09:00:00-05:002026-11-10T09:00:00-05:00We asked ChatGPT, Claude, Perplexity and Google’s AI Overviews 300 shopper questions in 15 categories. None of the questions named a brand. Of the 150 brands we track, 143 came up at least once and seven never did. Delta Air Lines led every brand with 62 of the 80 airline answers. Six of the ten airlines showed up in at least half of them. In beauty and hotels no brand reached even one answer in four. Four hotel brands were never mentioned at all. The sites ChatGPT listed most were capitalone.com, chase.com and apple.com. Google’s AI Overviews listed YouTube in 135 of its 260 answers.