X rolls out new AI ranking model and full-read retrieval for timeline recommendations
gaganghotra_ · x · 2026-10-20
X engineer singhai mused that "you never step into the same X algorithm twice" — it continuously learns from your interactions and everyone else's as people and products change. Elon Musk quoted the post announcing two important changes to timeline recommendations: a new AI ranking model that predicts probable time spent much better, and a retrieval model trained to surface posts people read all the way through. He added that user active seconds is growing exponentially and hitting all-time highs almost every day.
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