AI is changing how developers build software, and one of the most exciting tools in that shift is ChatGPT + Codex. If you’ve used ChatGPT for coding help, debugging, or brainstorming, Codex takes it further — from suggesting code to actually working on your codebase . In this guide, we’ll explore what ChatGPT Codex is, how to set it up, and how to use it effectively in real-world development. What is ChatGPT Codex? Codex is OpenAI’s AI coding agent designed for software engineering workflows. Unlike normal chat-based coding assistance, Codex can: ✔ Understand your codebase ✔ Edit files ✔ Run terminal commands ✔ Execute tests ✔ Fix bugs ✔ Create features ✔ Answer codebase-related questions OpenAI introduced Codex as an agentic coding tool integrated into ChatGPT and standalone environments, allowing developers to assign tasks directly to an AI agent. ([OpenAI][1]) ([OpenAI][2]) Think of it like: ChatGPT = AI pair programmer Codex = AI software engineer Why Use Codex?…