AI Visibility Index · Categories
Week of 7 November 2026 (ISO week 45) · Measured 7 November 2026 · Compared with 1 November 2026 · By the Mention Impossible team
Each page ranks the brands ChatGPT, Gemini, Claude and Perplexity named in one software category (40 answers: 8 buyer questions), with a week-to-week comparison against 1 November, the domains they cited, and a short takeaway. The main index has all six categories on one page.
Read with care. Samples are small (n = 40 answers per category; ChatGPT and Claude contribute 4 each) and changes are not significance-tested. One week compared with one week is not a trend. Pooled figures weight Perplexity most (24 of 40). API answers can differ from the consumer apps.
Full method: How we measure · Previous week: 1 November 2026 snapshot