Bilibili Tech

Jun 12, 2026 · Artificial Intelligence

A New UGC Video Evaluation Paradigm Built on 17 Billion Real User Interactions

The paper introduces CASTER, a multimodal AI system that uses Social‑CoT reasoning and the MEDEA framework to simulate diverse audience reactions, benchmarked on the large‑scale CASTER‑Bench dataset, and demonstrates superior performance over GPT‑5.2, Claude‑4.5‑Opus, and traditional VQA methods while already being deployed on Bilibili.