Build a Custom AI Assistant with GPT-4o: End-to-End Tutorial for Developers

1. What You’ll Build & Why It Matters

• Overview of the final product: a context-aware AI assistant that answers questions from your own knowledge base (docs, PDFs, or websites).
• Real-world use cases — customer support bots, internal knowledge retrieval, personal research copilot.
• Tech stack preview: Python + OpenAI API + LangChain + Streamlit (or Fast

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  Editor’s Pick: beginner-friendly AI coding course with project templates for building your first GPT-4o assistant.

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  Written byTheo Grant

  Theo Grant explores real-world AI applications, automation workflows, and hands-on tutorials at AI In Action Hub. Theo breaks down complex AI concepts into practical guides that help professionals and creators leverage AI in their daily work.