Musk: X timeline adds new AI ranking model, user active seconds hit all-time highs
elonmusk · x · 2026-10-20
Elon Musk announced two key changes to X's timeline recommendations: a new AI ranking model that predicts probable time spent far better, and a retrieval model trained to surface posts people read all the way through. He says user active seconds is growing exponentially and hitting all-time highs almost daily, and noted the rewritten X Android app was also a big deal after long-standing quality issues.
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