When AI Agents Forget What They Saw: The Goal Drift Problem in Video Research
Last Updated on January 20, 2026 by Editorial Team
Author(s): Kaushik Rajan
Originally published on Towards AI.
Why more autonomy doesn’t always mean better performance, and what the first video deep research benchmark reveals about the limits of agentic AI
You’re watching a museum tour video. Someone asks: “What’s the registration number of the closest ‘don’t miss’ exhibit to the main entrance?” You’d need to identify which museum it is from visual cues, find that museum’s official visitor guide online, cross-reference the floor map with the recommended exhibits list, and extract the specific catalog number. No single source contains the answer.

The article discusses the limitations of Multimodal Large Language Models (MLLMs) in video research, revealing the first benchmark designed to evaluate how these models handle complex questions that require both visual and web-based reasoning. Researchers from multiple institutions found that increasing autonomy in these models does not consistently lead to better outcomes due to challenges in maintaining visual cues during multi-round reasoning and search processes. Their findings suggest the need for more sophisticated AI design to tackle real-world tasks effectively.
Read the full blog for free on Medium.
Join thousands of data leaders on the AI newsletter. Join over 80,000 subscribers and keep up to date with the latest developments in AI. From research to projects and ideas. If you are building an AI startup, an AI-related product, or a service, we invite you to consider becoming a sponsor.
Published via Towards AI
Towards AI Academy
We Build Enterprise-Grade AI. We'll Teach You to Master It Too.
15 engineers. 100,000+ students. Towards AI Academy teaches what actually survives production.
Start free — no commitment:
→ 6-Day Agentic AI Engineering Email Guide — one practical lesson per day
→ Agents Architecture Cheatsheet — 3 years of architecture decisions in 6 pages
Our courses:
→ AI Engineering Certification — 90+ lessons from project selection to deployed product. The most comprehensive practical LLM course out there.
→ Agent Engineering Course — Hands on with production agent architectures, memory, routing, and eval frameworks — built from real enterprise engagements.
→ AI for Work — Understand, evaluate, and apply AI for complex work tasks.
Note: Article content contains the views of the contributing authors and not Towards AI.