OpenAI's Deep Research is an advanced AI-powered tool developed to provide in-depth analysis on complex topics by synthesizing real-time web data and conducting multi-step reasoning, setting it apart from standard LLM outputs. Available to ChatGPT Plus, Teams, Edu, and Enterprise users, it is designed for professionals in fields like finance, science, engineering, policy, law, business, and e-commerce, aiming to condense extensive manual research into minutes. Despite being highly capable and feature-rich, Deep Research has limitations such as potential hallucinations, data inaccuracies, and a premium price of $200/month. It competes with alternatives like Google's Gemini Deep Research and Perplexity Deep Research, each offering varying strengths, pricing, and accuracy levels. Notably, it excels in generating detailed reports with citations but struggles with original analysis and interpreting nuanced discussions. As of now, OpenAI plans to extend Deep Research access to free users, while free alternatives like HuggingFace's open-source implementation and Perplexity's limited free tier provide viable options for those deterred by the cost.