2-Langchain Series-Building Chatbot Using Paid And Open Source LLM's using Langchain And Ollama

Introduction

Welcome to my YouTube channel! I'm Krishn, and today we are diving into an exciting tutorial series on Langchain. This video will walk you through creating chatbot applications using both paid API LLMs and open-source LLMs. Integrating with APIs is a crucial skill for any AI engineer, and this series aims to equip you with the knowledge and practical skills to implement these integrations, focusing on the Langchain ecosystem.

Introduction

In this series, we have already discussed the basics in the first two tutorials. Today, we'll dive into practical implementation. We will start by setting up everything you need: virtual environments, environment variables, and required libraries.

We'll then build a simple chatbot that can use either paid API LLMs like OpenAI or open-source LLMs, integrating them within the Langchain framework. You’ll see how to utilize various Langchain components, such as chains, agents, models, prompts, and output parsers.

Setting Up Environment

Firstly, we'll create a virtual environment using the command: