LEAPS: An LLM-Empowered Adaptive Plugin for Taobao AI Search

• URL: http://arxiv.org/abs/2601.05513v1
• Date: Fri, 09 Jan 2026 03:41:27 GMT
• Title: LEAPS: An LLM-Empowered Adaptive Plugin for Taobao AI Search
• Authors: Lei Wang, Jinhang Wu, Zhibin Wang, Biye Li, Haiping Hou,
• Abstract summary: We propose LEAPS (LLM-Empowered Adaptive for Taobao AI Search), which seamlessly upgrades traditional search systems via a "Broaden-and-Empower" paradigm.<n>It employs a novel three-stage training strategy--inverse data augmentation, posterior-knowledge supervised fine-tuning, and diversity-aware reinforcement learning--to generate adaptive and complementary query combinations.<n>Fully deployed on Taobao AI Search since August 2025, LEAPS currently serves hundreds of millions of users monthly.
• Score: 17.074638179635613
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: The rapid advancement of large language models has reshaped user search cognition, driving a paradigm shift from discrete keyword-based search to high-dimensional conversational interaction. However, existing e-commerce search architectures face a critical capability deficit in adapting to this change. Users are often caught in a dilemma: precise natural language descriptions frequently trigger zero-result scenarios, while the forced simplification of queries leads to decision overload from noisy, generic results. To tackle this challenge, we propose LEAPS (LLM-Empowered Adaptive Plugin for Taobao AI Search), which seamlessly upgrades traditional search systems via a "Broaden-and-Refine" paradigm. Specifically, it attaches plugins to both ends of the search pipeline: (1) Upstream, a Query Expander acts as an intent translator. It employs a novel three-stage training strategy--inverse data augmentation, posterior-knowledge supervised fine-tuning, and diversity-aware reinforcement learning--to generate adaptive and complementary query combinations that maximize the candidate product set. (2) Downstream, a Relevance Verifier serves as a semantic gatekeeper. By synthesizing multi-source data (e.g., OCR text, reviews) and leveraging chain-of-thought reasoning, it precisely filters noise to resolve selection overload. Extensive offline experiments and online A/B testing demonstrate that LEAPS significantly enhances conversational search experiences. Crucially, its non-invasive architecture preserves established retrieval performance optimized for short-text queries, while simultaneously allowing for low-cost integration into diverse back-ends. Fully deployed on Taobao AI Search since August 2025, LEAPS currently serves hundreds of millions of users monthly.

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