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Difficulty-Aware Semantic-ID Optimization for Generative Recommendation

This story is from 2026-08-24. It is preserved in the archive; the latest stories are on the live feed.

arXiv:2608.20611v1 Announce Type: new Abstract: Semantic-ID-based generative recommendation casts retrieval and ranking as autoregressive generation over hierarchical item identifiers. A common recipe is SFT followed by GRPO, yet vanilla GRPO is poorly matched to this tree-structured task. Under th…

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  1. 2026-08-24 04:00 · arXiv cs.AI
    Difficulty-Aware Semantic-ID Optimization for Generative Recommendation

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