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.

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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.

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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

This is how to use ChatGPT today.

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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