#HomeMixer

The latest open-source release integrates the next-generation 'Phoenix' candidate pipeline and scorer with a specialized GPU scoring runtime (BDSM). Key updates also introduce post-engager feature hydration, a zero-favorite codivert filter, and an overhaul of confidence-based abuse enforcement controls.

The xAI and X engineering teams have officially released an updated open-source codebase featuring the Rust-based 'home-mixer' architecture. This update details the modern 'For You' and 'Following' candidate pipelines, integrating SimClusters ANN retrieval, brand safety scoring, out-of-network filters, cold-start creator boosts, and value model (VM) ranking debiasing.