“The For You feed algorithm retrieves, ranks, and filters posts from two sources: In-Network (Thunder): Posts from accounts you follow Out-of-Network (Phoenix Retrieval): Posts discovered from a global corpusBoth sources are combined and ranked together using Phoenix, a Grok-based transformer model that predicts engagement probabilities for each post. The final score is a weighted combination of these predicted engagements.We have eliminated every single hand-engineered feature and most heuristics from the system. The Grok-based transformer does all the heavy lifting by understanding your engagement history (what you liked, replied to, shared, etc.) and using that to determine what content is relevant to you.”
Source : xai-org/x-algorithm: Algorithm powering the For You feed on X
