OpenAI: AI Foundations path
OpenAI Academy's own three-course progression, about four hours in all, each with a completion certificate. AI Foundations builds the habits (clear instructions, context, review, responsible use) on a task you already do; Applied AI Foundations turns those habits into a repeatable workflow; Agents and Workflows then hands that workflow to an agent and teaches you to direct, bound and review its work. Take them in this order: each one assumes the last.
OpenAI Academy
OpenAI's free learning hub: three self-paced foundations courses with completion certificates (AI Foundations, Applied AI Foundations, Agents and Workflows), on-demand webinar recordings for ChatGPT and Codex, and live events. Sign-up is free and open to anyone.
AI Foundations
Start here if you've never used ChatGPT or GPT-based tools seriously, this is OpenAI's own on-ramp, and it pairs well with Stanford's ChatGPT Edu access.
Applied AI Foundations
For once you're past basics and want to apply AI to recurring work tasks, the natural second step after AI Foundations.
Agents and Workflows
Covers directing multi-step AI agents, most relevant once you're comfortable with prompting and want to automate a real workflow.