Understanding LLMs: How They Work and the Role of a Prompt Engineer

Everton Araújo
2 min readMay 29, 2024

Introduction: In the world of artificial intelligence, Large Language Models (LLMs) have emerged as powerful tools for natural language processing. These models, like OpenAI’s ChatGPT, have the ability to understand and generate human-like text. This post will explore what LLMs are, how they function, and the crucial role of prompt engineers in harnessing their potential.

Photo by Shubham Dhage on Unsplash

What is an LLM? A Large Language Model (LLM) is a type of artificial intelligence that uses machine learning algorithms to process and generate human language. These models are trained on vast datasets containing diverse text from books, articles, websites, and more. The training process enables LLMs to learn patterns, structures, and meanings within the text, allowing them to generate coherent and contextually relevant responses.

How LLMs Work:

Training Phase:

  • LLMs are trained using unsupervised learning on massive datasets.
  • The model learns to predict the next word in a sentence, refining its understanding of language patterns over time.

Fine-Tuning:

  • After initial training, LLMs can be fine-tuned on specific datasets to improve their performance in particular domains or tasks.

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