Information has never been more abundant, but the ability to extract meaning from it remains as elusive as ever. AI deep research tools promise to transform how we access, synthesise, and apply knowledge. Instead of manually searching for sources, reading papers, and compiling insights, a well-structured research plan is generated in seconds. ChatGPT, Gemini, Grok, and Perplexity have all introduced their own versions, each attempting to redefine what research means in the AI era.