ResearchResearch paperLarge Language Models · Retrieval, RAG & Search · Reinforcement Learning1 source · Oct 19, 2026

Decision4Rec: A Jev-Inspired Framework of Decision Models on Knowledge and Active Graphs for Multi-Agent Recommender Systems

We present Decision4Rec, an open and modular framework that makes decision models useful for recommendation.

Key points

  • Decision models, such as the commercial Jev, are language models that return one probability for each option of a question instead of generating text.
  • A knowledge graph writes the logs of each recommendation scenario as short statements on a defined scale, such as "sold: top 10%".
  • A decision model, trained once on real choices of three scenarios, reads them through one interface of typed questions, and a fusion step combines its answers with the score of the ranker.
  • Any model with this interface can be used, and we run the commercial Jev, the released open Kev and Kev models trained by us on recommendation requests.

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