BLUE from Google internship lands NeurIPS: LLM-written user profiles boost recommendations

shangbinfeng · x · 2026-09-29

BLUE, a Google internship work accepted to NeurIPS 2026, uses reinforcement learning to align LLM-generated textual user profiles with embedding-based recommendation objectives: an embedding model provides reward signals pulling profiles toward positive items, plus next-item-prediction supervision in text space. On Amazon Reviews 2023 and Google Local Reviews in zero-shot sequential recommendation, BLUE consistently beats strong baselines under both frozen and trainable embeddings, with clear gains in cross-domain transfer.

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