{"object_id":"asca:pairwise-overlap-ranking@2026-05.v1","title":"Which AI search platforms share the most sources?","claim":"Grok and Perplexity have the highest normalized pairwise domain overlap at 20.37%; AI Mode and ChatGPT have the lowest at 1.73%.","source_object_id":"asca:source-overlap@2026-05.v1","data_url":"/data/platform-source-overlap-2026-05.csv","metric":"Jaccard overlap of unique hostname sets after removing only a leading www prefix","limitations":["Domain overlap does not measure answer similarity, citation quality, or traffic."],"related_object_ids":["asca:normalization-sensitivity@2026-05.v1","asca:interpretation-boundaries@2026-05.v1"]}