TLDR: MM-BrowseComp is a new benchmark with 224 challenging, hand-crafted questions designed to evaluate AI agents’ ability to browse and reason with multimodal web content (images, videos, text). It highlights that current state-of-the-art models, including OpenAI o3, struggle significantly with these tasks, revealing a critical need for improved multimodal reasoning and integrated tool use in AI agents.
In the rapidly evolving world of artificial intelligence, AI agents are becoming increasingly adept at navigating the internet to find information. While existing tools like OpenAI’s BrowseComp have pushed the boundaries of evaluating these agents, they primarily focus on text-based information. However, the real world of the internet is rich with images, videos, and other visual content. To address this crucial gap, a new benchmark called MM-BrowseComp has been introduced.
What is MM-BrowseComp?
MM-BrowseComp is a novel and comprehensive benchmark specifically designed to test AI agents’ ability to retrieve and reason with multimodal content. It consists of 224 challenging, hand-crafted questions. What makes these questions unique is that they often include images directly in the prompts, and the critical information needed to answer them might be hidden within images or videos found on webpages. This means that AI models relying solely on text will not be able to solve these tasks effectively.
How Was It Built?
The creation of MM-BrowseComp was a meticulous process, involving over twenty master’s and PhD-level AI researchers. The questions are distributed across 22 distinct subtasks, categorized into five broad areas: Media, Technology, Society, Geography, and Academics. A key design principle was ‘Mandatory Multimodal Dependency,’ ensuring that essential information was embedded primarily in visual content, preventing text-only shortcuts.
To ensure a rigorous evaluation, each question comes with an ‘Irreducible Reasoning Checklist.’ This checklist outlines the minimal, sequential steps an agent needs to take to arrive at the correct answer. This allows for a more detailed assessment, distinguishing between an agent that genuinely reasons through a problem and one that might just guess correctly.
The benchmark also enforces high quality standards, including ‘Inherent Difficulty’ (questions are hard for both humans and advanced AI models), ‘Verifiability and Temporal Stability’ (answers are concise and don’t change over time), and ‘Answer Uniqueness’ (each question has a single, correct answer).
Key Findings from Evaluations
The researchers evaluated several state-of-the-art AI models and agents on MM-BrowseComp. The results highlight the significant challenges current models face with multimodal browsing:
- Even top models like OpenAI o3, when equipped with tools, achieved an overall accuracy of only 29.02%. Other advanced models struggled to surpass 10% accuracy.
- A major insight is the ‘Suboptimal Multimodal Capabilities’ of current models. They perform significantly worse when dealing with images and videos compared to text.
- Many agents ‘Lack Native Multimodal Reasoning.’ They often rely on separate tools to interpret images, which can lead to information loss and errors. OpenAI o3 was noted as an exception, demonstrating more integrated multimodal reasoning.
- ‘Reflective agents,’ which can self-correct and learn from their actions, showed greater robustness.
- High performance requires a ‘synergistic combination’ of strong foundational reasoning ability and a comprehensive set of tools. Neither is sufficient on its own.
- While increasing the number of attempts (test-time scaling) can improve overall accuracy, it doesn’t necessarily improve the underlying reasoning process, suggesting that models might be ‘guessing’ more effectively rather than truly understanding.
Understanding Failures
An analysis of common failure modes revealed that ‘visual hallucination’ (describing something not in the image or misidentifying visual elements) and ‘incorrect reasoning’ were significant contributors to errors. ‘Tool execution failure,’ where the agent’s tools (like a web browser) encountered technical issues, also played a role. These findings underscore the need for more robust multimodal backbones and better integration of reasoning with reliable tools.
Also Read:
- Evaluating AI Hallucinations in First-Person Video Analysis
- Evaluating AI’s Crystal Ball: A New Benchmark for Future Prediction
The Path Forward
MM-BrowseComp serves as a crucial tool for advancing AI. By focusing on the complex task of multimodal web browsing, it exposes critical limitations in current AI agents. The detailed checklist for each question can also provide valuable feedback for training more sophisticated agents using techniques like reinforcement learning. This benchmark is expected to catalyze research towards a new generation of AI agents capable of truly navigating the rich and complex multimodal web. For more details, you can refer to the full research paper available here.


