Substack AI Visibility Trend in UGC Platforms

UGC Platforms AI visibility trends show how entity AI Index scores have moved across 10 completed public ChatGPT leaderboard snapshots from May 3, 2026 to Jun 2, 2026.

YouTube leads the latest ChatGPT snapshot with a 31.4 AI Index and 28.6% mention rate.

YouTube is down 60 AI Index points across the visible window, moving from 91.4 to 31.4 on ChatGPT.

Use the entity filters to compare leading brands over time and separate durable visibility trends from one-off ranking movement in a single AI engine.

Read this trend alongside the main UGC Platforms leaderboard and entity pages: the trend view explains historical movement, while ranking pages show the latest cross-entity position, mention rate, and score gap.