Let me say something bold:

99% of people are still using ChatGPT as a search engine, while true experts are using Codex as an employee.
From OpenAI Academy's "How to use Codex for everyday work"
The point is to let everyone know: don't let AI answer questions, let AI complete tasks.
I've compiled a text index
✅ 01｜Market Research
Feed Codex a bunch of webpages, PDFs, Excel files, and it directly outputs a readable industry research report instead of scattered summaries.
✅ 02｜Meeting Organization
Feed in meeting recordings, chat logs, Notion notes—automatically generate meeting minutes, to-do items, responsible persons, and deadlines.
✅ 03｜PPT Creation
Give background info and requirements, directly generate a presentation PPT outline, slide content, and speaker notes.
✅ 04｜Excel Analysis
Automatically consolidate multiple tables, calculate, find anomalies, create charts—no need to copy manually.
✅ 05｜Project Management
Automatically split tasks based on PRD and requirement documents, generate Roadmap, Gantt chart ideas, and risk points.
✅ 06｜Competitive Analysis
Scrape official websites, blogs, changelogs, organize feature changes, pricing, positioning, and competitive advantages.
✅ 07｜Document Organization
Automatically classify dozens of PDFs and Word files, extract key points, generate a unified knowledge base.
✅ 08｜Process SOP
Organize your operation steps into a standard process that new employees can follow directly.
✅ 09｜Auto Generate Weekly/Monthly Reports
Aggregate Slack, emails, documents, data, and automatically generate work summaries for your boss to read.
✅ 10｜Automate Repetitive Work
Schedule daily reports, monitor data, organize files, generate reports—let AI work for you proactively.