Meta (Engineering at Meta) · LLM Recommendation System

Your algorithm

Meta describes Your algorithm, a suite of AI-powered tools on Facebook that lets people state their interests in natural language and steer Feed and Reels recommendations. LLMs generate the initial interest profile and Lately Summary, validate each preference edit using a smaller model, and provide a final check against Not Interested In topics. The post also covers the ranking funnel changes, including dedicated retrieval sources per interest, layered filtering, and cache invalidation for faster responsiveness. The page text is truncated, so the evaluation details and any availability information are not included.