To learn OpenAI Codex in 2026, follow this order: start with a beginner crash course, then a full course, then advanced deep dives. This roadmap sequences 18 of the best free YouTube videos — beginning with "Complete Beginner's Guide to OpenAI’s Codex App" by John Kim (25,425 views).

Step 1

Start Here

Beginner-friendly OpenAI Codex intros and crash courses

Step 2

Core Skills

Full courses and comprehensive OpenAI Codex tutorials

Step 3

Advanced & Deep Dives

Go deeper into OpenAI Codex internals and real-world use

Step 4

Stay Current

The freshest OpenAI Codex videos from the last 6 months

Want a roadmap tailored to your goal and experience? Try the free AI learning planner →