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How to Build a Custom AI Chatbot Using GPT-4 and LangChain: A Step-by-Step Tutorial

1. Setting Up Your Development Environment

• Install Python 3.9+ and create a virtual environment to isolate dependencies
• Install required libraries: openai, langchain, streamlit (or flask)
• Set up your OpenAI API key securely using environment variables (e.g., .env file)

2. Understanding the Core Components of a Chatbot

• Define the role of the language model (GPT-4) and its key parameters (temperature, max tokens)
• Learn how LangChain simplifies
  

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