Codex
AI pair programming that edits code from instructions.
Codex is taught here in 3 lessons, running from What Codex is and how to set it up through to Reviewing output and its limits. Each lesson takes one topic, shows the working code, and links onward to the next, so the course can be read straight through in order.
| Track | AI & Intelligent Development |
| Lessons | 3 |
| Level | Beginner |
| Reading time | about 39 minutes |
| Prerequisites | Helpful, but not required: OpenCV |
Lessons
- What Codex is and how to set it upAn agent that reads your repository and edits files, rather than a completion popup - plus a starting configuration you can trust.
- Using Codex in a real workflowScope a task so it can be verified, iterate on a branch, and keep the human in the loop at the points that matter.
- Reviewing output and its limitsThe failure modes that matter, why a passing test suite is not proof, and what an agent should never be trusted to verify about itself.
More in AI & Intelligent Development
AI Basics AI Agents Math for AI Machine Learning scikit-learn TensorFlow PyTorch Natural Language Processing LangChain Ollama OpenCV Claude Code OpenCode Vibe Coding Selenium Playwright
FAQ
How long does the Codex course take?
It has 3 lessons, about 39 minutes of reading. Expect roughly twice that if you type out and run every example.
Do I need prior experience for Codex?
Not strictly. It helps to have read OpenCV first, because some lessons build on it, but every lesson explains its own assumptions.
What should I read after Codex?
Continue with Claude Code (3 lessons), the next course in AI & Intelligent Development.
Last refreshed 2026-09-18.