Reading up on recommendation-systems

The X (Twitter) For You feed algorithm uses a Grok-based transformer model and open-sourced components to replace hand-crafted rules with ML, retrieving and ranking posts via in-memory stores and similarity search.

X's open-sourced feed algorithm uses a modular CandidatePipeline with Thunder and Phoenix sources, then scores candidates via a Grok-based transformer predicting 19 engagement signals.