Module 3: LLMs in Practice
From Theory to Real-World Application
Now that you understand what LLMs are and how they work, let's explore the practical side: using APIs, understanding costs, and recognizing limitations.
What You'll Learn
In this module, you will:
- Understand APIs and how applications connect to LLMs
- Learn about tokens and pricing to estimate costs
- Recognize limitations including the hallucination problem
Module Structure
| Chapter | Topic | Duration |
|---|---|---|
| Chapter 1 | Using LLM APIs | 20 min |
| Chapter 2 | Tokens and Pricing | 25 min |
| Chapter 3 | Limitations and Hallucinations | 20 min |
| Quiz | Module 3 Quiz | 30 min |
Key Concepts Preview
API (Application Programming Interface)
A way for applications to communicate with LLM services. Think of it as a phone line to the AI.
Tokens
The units LLMs process and charge for. Not quite words—usually word pieces.
Rate Limits
How many requests you can make per minute or day.
Hallucination
When LLMs generate confident-sounding but incorrect information.
The Business Side of LLMs
Understanding the practical aspects helps you:
- Budget projects that use AI
- Choose the right model for your needs
- Avoid common pitfalls with AI applications
- Set realistic expectations for what LLMs can do
Let's Get Started!
Begin with Chapter 1: Using LLM APIs to learn how applications connect to LLMs.
Estimated time to complete this module: 1.5-2 hours