How AI Agents Actually See Your Screen: DOM Control vs Screenshots Explained

AI agents that can control your computer are no longer a research demo. They are real products you can download and use today. ChatGPT Atlas browses the web for you. Anthropic's Claude can operate a virtual desktop. Open-source tools like Fazm take voice commands and execute real actions on your Mac. But here is a question most people never think to ask: how does the agent actually see what is on your screen? This is not a philosophical question. It is a deeply practical one. The approach an AI agent uses to perceive and interact with your computer affects everything - how fast it moves, how often it makes mistakes, how much it costs to run, and whether your screen content gets sent to a cloud server. There are two fundamentally different approaches, and understanding them will change how you evaluate any AI agent. If you are interested in the engineering side, our post on building a macOS AI agent in Swift covers how we implemented both approaches in practice. The Two Approaches at a