How to Build ChatGPT - Part 2: RAG & Connectors

Learn how to build your own ChatGPT app step-by-step—covering prompting, RAG, connectors, agents, reasoning, and more. 🚀 With GPT-5 and open-weight models reshaping AI, this series shows you how to engineer, ship, and scale production-ready LLM applications.

In Part 2, we dive into RAG + connectors—the key to retrieval, tools, and agents. Don’t miss the journey!

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Speakers:
Dr. Greg, Co-Founder & CEO @ AI Makerspace
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The Wiz, Co-Founder & CTO @ AI Makerspace
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00:00 Intro & Evolution of RAG and MCP
06:00 Understanding Retrieval Augmented Generation (RAG)
13:00 Simplifying RAG with Responses API
18:00 What is MCP and Why It Matters
22:00 Connecting Data and Security Concerns
28:00 Choosing Between RAG and MCP for Use Cases
32:00 Demo: Building Connectors and Using Responses API
39:00 Live Walkthrough: File Search & MCP Demo
44:00 Q&A: Responses API, Open Source vs. Abstraction
52:00 Looking Forward: Context Engineering & Next Steps