From the course: Your Top AI Questions Answered: AI Literacy for Everyone

What's an LLM?

From the course: Your Top AI Questions Answered: AI Literacy for Everyone

What's an LLM?

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- [Instructor] You've likely heard the term LLM used everywhere, but what does it actually stand for and what is it? In this video, we're going to demystify one of the most important concepts in modern AI, the large language model. Let's break down the name itself as each word is important. The L stands for large. This refers to the incredible scale of these models. They're trained on vast, internet-sized data sets and are built with billions of internal connections or parameters. The L for language is straightforward. Their primary domain is understanding and generating human language. And M stands for model because, at its core, an LLM is a very sophisticated mathematical model, specifically a type of neural network that has learned the patterns of language. So how does it actually generate those remarkably human-like sentences? The fundamental process is surprisingly simple in concept. At its core, an LLM is a powerful prediction engine. When you give it a piece of text, its main job is to calculate the single most probable word to come next. It then adds that word to the sequence and repeats the process, calculating the next most likely word and the next, stringing them together one by one to form coherent sentences and paragraphs. This incredible capability is made possible by a specific technology you heard about in an earlier lesson, the Transformer architecture. Before the Transformer, models struggled to keep track of context in long sentences. The Transformer allows an LLM to weigh the importance of every word in the prompt, understanding how they relate to each other no matter how far apart they are. This ability to understand context is what truly puts the large in large language model and enables their deep linguistic capabilities. You're already interacting with LLMs every single day, even if you don't realize it. They are the brains powering the most advanced chat bots and virtual assistants. They're being integrated into web search to provide direct answers and summaries. They act as powerful assistants for writing email and generating software code, and they're enabling incredibly accurate real-time language translation. So to put it all together, an LLM is a massive neural network built on the Transformer architecture and trained on vast amounts of text. It excels at the complex task of understanding and generating human language, fundamentally by predicting the most likely next word in a sequence. Now that you know what an LLM is, we're ready to explore how to interact with them effectively.

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