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- MonDive#37: The Complete Guide to ChatGPT
MonDive#37: The Complete Guide to ChatGPT
Learn how to use ChatGPT for everyday work, file analysis, web search, automation, and more in one place.

Welcome to the MonDive
Today in MonDive, we’re diving into ChatGPT, one of the most complete AI workspaces right now, built to go beyond simple chatting and help with writing, research, coding, images, files, and everyday work.
We’ll cover what makes ChatGPT useful, how the Free and Plus plans compare, how the interface works, and the key tools that matter most, from file uploads and web search to Deep Research, Agent Mode, Projects, and connected apps. By the end, you’ll have a clear picture of how to use it better and which features are actually worth your attention.
Alright, let’s dive in.
Leadership Can’t Be Automated
AI promises speed and efficiency, but it’s leaving many leaders feeling more overwhelmed than ever.
The real problem isn’t technology.
It’s the pressure to do more with less — without losing what makes your leadership effective.
BELAY created the free resource 5 Traits AI Can’t Replace & Why They Matter More Than Ever to help leaders pinpoint where AI can help and where human judgment is still essential.
At BELAY, we help leaders accomplish more by matching them with top-tier, U.S.-based Executive Assistants who bring the discernment, foresight, and relational intelligence that AI can’t replicate.
That way, you can focus on vision. Not systems.
When and Why to Use ChatGPT
ChatGPT is worth using because it brings many useful tools into one place. Instead of jumping between different apps for writing, research, brainstorming, image creation, file analysis, and coding, you can do all of these in ChatGPT.
Get the most value from one subscription
Best for General daily use
Third-party AI integrations
The biggest ecosystem of any model
Gets your work done
Highest usages limit
ChatGPT Free vs ChatGPT Plus
Features | ChatGPT Free | ChatGPT Plus |
|---|---|---|
Price | $0 | $20/month |
Advanced reasoning models | ❌ | ✅ |
Projects | ❌ | ✅ |
Tasks | ❌ | ✅ |
Custom GPTs | ❌ | ✅ |
Early access to new features | ❌ | ✅ |
Agent mode | ❌ | ✅ |
Message limits | Limited | Higher |
File uploads | Limited | Expanded |
Image generation | Limited and slower | Expanded and faster |
Deep research | Limited | Expanded |
Memory and context | Limited | Expanded |
Codex usage | Limited | Expanded |
How to Use ChatGPT and Its Interface Breakdown
Use the best model for what you need

GPT-5.3 is now the default model for logged-in ChatGPT users.
Use the model picker to switch to GPT-5.4 Thinking for harder tasks.
GPT-5.4 Thinking is better for stronger reasoning, research, tool use, and longer thinking.
Let ChatGPT read your files
1. Let ChatGPT read your file

Upload PDFs, spreadsheets, documents, and images.
Ask ChatGPT to summarize, explain, and extract insights from them.
Turn your files into tables and charts in chat.
Save everything to the Library and reuse it later.
2. Turn on Deep Research for complex tasks

Built for complex questions, not quick lookups.
Deep Research can plan the work before it starts.
It researches across the public web, specific sites, uploaded files, and enabled apps.
It returns a structured report with citations, so you can check the sources yourself.
3. Use Agent Mode to get work done

Browse sites, use files, connect, and complete tasks in one place.
Fill forms and edit spreadsheets without leaving ChatGPT.
Agent mode and Deep Research are advanced tools available on paid plans, depending on subscription.
4. Bring your tools together in ChatGPT

Apps bring your connected tools into ChatGPT.
They can search across your sources and pull in useful information.
They can help with deeper research across multiple sources.
Some apps can keep content synced and ready to use.
Some apps can also take actions for you inside ChatGPT.
GitHub can bring live repository data into ChatGPT, including code, READMEs, and docs.
5. Stay in chat, search the web

Get fast, up-to-date answers without opening another search engine.
ChatGPT Search brings in timely information right inside the chat.
See links to relevant web sources as you go.
Search the web and stay in the same workflow.
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And that's a wrap on today's MonDive!


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