Zero-Shot Next-Item Recommendation using Large Pretrained Language Models
Authors: Lei Wang, Ee-Peng Lim
AI-generated Key Points
- Large language models (LLMs) can be used for next-item recommendations in the zero-shot setting.
- LLMs have achieved impressive zero-shot performance in various natural language processing tasks, but their application as recommenders is unexplored.
- Two major challenges for LLMs as recommenders are the large recommendation space and lack of knowledge about user preferences.
- The authors propose a prompting strategy called Zero-Shot Next-Item Recommendation (NIR) prompting to address these challenges.
- NIR prompting involves using an external module to generate candidate items based on user or item filtering.
- The proposed approach incorporates a 3-step prompting process to guide GPT-3, a specific LLM, in capturing user preferences and recommending movies.
- Evaluation on the MovieLens 100K dataset shows strong zero-shot performance, outperforming some sequential recommendation models trained on the entire dataset.
- This research opens up opportunities for using LLMs as recommenders and provides a novel strategy for next-item recommendations in the zero-shot setting.
- Code for implementing this strategy is available on GitHub at https://github.com/AGI-Edgerunners/LLM-Next-Item-Rec.
Abstract: Large language models (LLMs) have achieved impressive zero-shot performance in various natural language processing (NLP) tasks, demonstrating their capabilities for inference without training examples. Despite their success, no research has yet explored the potential of LLMs to perform next-item recommendations in the zero-shot setting. We have identified two major challenges that must be addressed to enable LLMs to act effectively as recommenders. First, the recommendation space can be extremely large for LLMs, and LLMs do not know about the target user's past interacted items and preferences. To address this gap, we propose a prompting strategy called Zero-Shot Next-Item Recommendation (NIR) prompting that directs LLMs to make next-item recommendations. Specifically, the NIR-based strategy involves using an external module to generate candidate items based on user-filtering or item-filtering. Our strategy incorporates a 3-step prompting that guides GPT-3 to carry subtasks that capture the user's preferences, select representative previously watched movies, and recommend a ranked list of 10 movies. We evaluate the proposed approach using GPT-3 on MovieLens 100K dataset and show that it achieves strong zero-shot performance, even outperforming some strong sequential recommendation models trained on the entire training dataset. These promising results highlight the ample research opportunities to use LLMs as recommenders. The code can be found at https://github.com/AGI-Edgerunners/LLM-Next-Item-Rec.
Tools for this paper
Ask questions about this paper to our AI assistant
You can also chat with multiple papers at once here.
The previous summary was created more than a year ago and can be re-run (if necessary) by clicking on the Run button below.
Similar papers summarized with our AI tools
Navigate through even more similar papers through a
tree representationLook for similar papers (in beta version)
We compare the title and abstract with papers indexed in our database. For arXiv papers, we search within the same category; for DOI and other sources, we search across sources and subjects. You can rerun the search as our database grows.
Disclaimer: The AI-based summarization tool and virtual assistant provided on this website may not always provide accurate and complete summaries or responses. We encourage you to carefully review and evaluate the generated content to ensure its quality and relevance to your needs.