This article discusses the strengths and shortcomings of ChatGPT, a large language model by OpenAI, emphasizing the need for using trusted sources to avoid 'hallucinations' or factually incorrect statements. It offers a detailed explanation of concepts like hallucinations, trusted sources, contextual data, and context window. The article also delves into the use of vector databases for effective query management, challenges of time, cost, and effort in setting up such a system, and the potential future improvements in LLMs.