花了3天时间，万字长文一口气评测四大AI浏览器：Dia、Fellou、Comet、Edge。

Core Viewpoint - The AI browser market is heating up with major players like Microsoft and OpenAI entering the field, indicating a growing interest and potential for innovation in this sector [2][4]. User Experience and Interaction - User experience ratings for the AI browsers are as follows: Dia > Fellou > Edge > Perplexity Comet, with Dia being the most favored [16]. - Interaction design varies, with Perplexity Comet allowing easy access to its AI assistant, while Dia requires navigating to specific pages [17][18]. - Edge's interaction is complex, featuring multiple modes that can confuse users [22][30]. - Personalization features are stronger in Dia, allowing users to customize the AI assistant's personality and skills, while Fellou offers limited personalization options [31][36]. Agent Capabilities - The agent capabilities of the browsers were tested through two cases: booking flights and automating social media interactions. - Dia currently lacks agent functionality, while Fellou can autonomously book flights using user credentials [57][103]. - Comet requires the user to open the relevant page first before executing commands, but it performs well once the context is established [65][103]. - Edge's agent capabilities are cumbersome, requiring manual input and verification steps, making it less efficient [104][137]. Information Collection and Processing - All four browsers perform well in generating speed and information accuracy, but differ in their ability to gather and present information. - Dia's recent update improved its search capabilities, allowing for better information sourcing from major media outlets [146][149]. - Fellou excels in output quality, providing visual reports and comprehensive source citations, but lacks depth in content [151][155]. - Comet offers a high level of convenience in searching and has a wide range of sources, but its output is primarily text-based [158][159].