Everything you need to know about ChatGPT - basics, features, prompts, use cases, API, safety, and resources.
One goal: By the end, you’ll use ChatGPT like a pro - for work, study, content, coding, business, and daily life.
What ChatGPT is, how it works, versions
Web, mobile, settings, history
4o, vision, voice, browsing, DALL-E, canvas, projects
Frameworks and 50+ ready prompts
Students, creators, coders, business, research
CoT, few-shot, custom GPTs, meta prompts
OpenAI API, integration basics
Privacy, limits, roadmap, resources
ChatGPT is a conversational AI assistant built by OpenAI. It can answer questions, write content, help with code, brainstorm ideas, and much more.
Understands natural language and responds in a human-like way.
Uses Large Language Models trained on vast internet text.
Remembers context within a chat and follows the thread.
Creates new text based on your instructions.
Can help with writing, coding, analysis, learning, planning.
Supports dozens of languages including Gujarati, Hindi, English.
Your text is split into tokens
Model maps meaning using patterns
Guesses the best next word
Builds a full response
Human feedback improves answers
ChatGPT is not “thinking.” It predicts the most likely words to follow based on patterns from training data and fine-tuning.
| Feature | Free | Plus ($20/mo) | Team ($25/user) | Enterprise |
|---|---|---|---|---|
| Model Access | GPT-4o mini, limited GPT-4o | GPT-4o, o1, more messages | Shared workspace | Unlimited, admin controls |
| Web Browsing | Limited | Yes | Yes | Yes |
| DALL-E Images | Limited | Included | Included | Included |
| Advanced Data Analysis | Limited | Included | Included | Included |
| Custom GPTs | Use only | Create & use | Create & share | Admin governance |
| API | Separate billing | Separate billing | Separate billing | Custom contracts |
chat.openai.com or download app
Email, Google, Apple, or Microsoft
Confirm email and phone number
Click “New chat” and type
Subscribe to Plus for more features
💡 Tip: Use the same account on web, iOS, and Android - your history syncs.
Chat history, new chat button, custom GPTs, settings.
Your conversation appears here with model responses.
Type prompt, attach files/images, send voice, or use browse.
Choose GPT-4o, GPT-4o mini, o1, etc.
Custom instructions, memory, theme, data controls.
Account, subscription, API keys.
Use voice mode while walking or cooking - hands-free learning and brainstorming.
Auto-saved. Search past chats in sidebar.
Start fresh so old context does not influence answers.
Chats won’t appear in history or be used to train models.
Switch between light, dark, and system.
Turn off chat history & training.
Remove individual chats or all history.
Tell ChatGPT who you are and how it should respond once - applies to every new chat.
"I am a content creator from India making educational YouTube videos in Gujarati. My audience is students and beginners."
"Use simple language, give examples, format as bullets, and keep responses under 300 words unless asked."
Profile → Settings → Personalization → Custom Instructions. Available on Plus and Free in most regions.
Memory lets ChatGPT remember facts across all your chats, so you don’t have to repeat yourself.
ChatGPT picks up useful details from conversations.
Tell it directly: “Remember that I prefer short answers.”
View and delete specific memories in settings.
Disable memory if you want every chat isolated.
Within one chat context still applies normally.
Sensitive info should not be saved in memory.
Interview practice, language learning, bedtime storytelling, hands-free coding discussion, rehearsing presentations.
Screenshots, documents, handwritten notes, diagrams.
OCR-style extraction from images and PDFs.
Math equations, charts, graphs, code errors.
Review UI designs, logos, thumbnails.
Explain what a chart or map shows.
Translate text visible in any image.
ChatGPT can run Python code inside the chat to analyze data, build charts, and solve math problems.
Bar, line, pie, scatter, heatmaps.
Complex calculations and simulations.
Fix missing values, format columns.
CSV to JSON, image resizing, PDF text extraction.
Statistics, correlations, segmentation.
Trend lines and projections.
Ask explicitly: “Search the web for the latest iPhone 16 reviews and summarize pros and cons with source links.”
Describe a scene and ChatGPT generates it.
Ask to change objects, colors, style.
Photorealistic, anime, oil painting, 3D.
Square, landscape, portrait.
You own images you create with Plus.
ChatGPT rewrites short prompts into detailed ones.
Build your own AI assistant for a specific task - no coding required.
Browse and use GPTs made by OpenAI and the community. Categories: writing, productivity, research, programming, education.
Canvas is a side-by-side workspace for writing and coding with ChatGPT - edit inline, ask for changes, and iterate faster.
Draft blog posts, essays, emails with inline edits.
Write and review code in a dedicated panel.
“Make it longer,” “Add emojis,” “Fix bugs.”
See original and revised versions together.
Select text and ask for targeted changes.
Copy final output easily.
ChatGPT can now schedule recurring tasks to run later - like a personal assistant.
“Send me a daily summary of AI news every morning.”
“Every Monday, summarize my industry updates.”
“Draft a weekly report from my data every Friday.”
Get results via app or email.
Plan and track recurring goals.
Only available to some Plus users; check access.
GPT-4o is OpenAI’s flagship model - faster, cheaper, and natively multimodal.
2x speed of GPT-4 Turbo at half the cost.
Understands images, documents, screenshots.
Native audio processing for natural voice.
Better performance in non-English languages.
Stronger reasoning and coding.
Limited messages available for free users.
o-series models spend more time “thinking” before answering - ideal for complex problems.
Olympiad-level math and logic.
Competitive programming and debugging.
Complex scientific reasoning.
Shows summary of reasoning process.
Takes longer but more accurate.
Hard problems, not quick creative tasks.
Use o1 when GPT-4o gives wrong answers for math, coding puzzles, or multi-step planning.
Embed chat widgets, landing page generators.
iOS/Android in-app AI assistant.
WhatsApp, Slack, Telegram bots.
Draft and classify emails.
Google Sheets/Excel AI add-ons.
Zapier, Make, n8n with OpenAI API.
A prompt is an instruction. Better prompts = better outputs.
Bad: "Write about dogs." Good: "Write a 300-word blog about golden retriever training for first-time owners."
“Act as an experienced UX designer…”
Ask for bullets, tables, JSON, scripts.
“Keep it under 200 words.”
“Explain like I’m 10 years old.”
Refine based on first output.
Who is ChatGPT?
What to do?
Background info?
How to output?
Show samples
The next slides give you copy-paste prompts for common tasks. Replace bracketed text with your details.
Blogs, emails, essays
Study, summaries, exams
Code, debug, explain
Ads, SEO, social
Scripts, titles, thumbnails
Papers, data, analysis
Strategy, HR, finance
Life, health, planning
Assign an expert persona.
Ask it to think step-by-step.
Give examples of desired output.
Ask it to critique and improve.
Use AI to write better prompts.
Ask for opposing views.
JSON, tables, markdown.
Break big tasks into steps.
Show ChatGPT examples so it learns the pattern.
Make ChatGPT show its reasoning - much better for math, logic, and decisions.
“Explain your reasoning step by step,” “Think carefully before answering,” “Show your work.”
💡 Specific roles produce domain-specific depth and tone.
Use ChatGPT to optimize your prompts.
Learn from good outputs.
Never publish ChatGPT output as fact without verification - especially for news, health, finance, and legal topics.
Enterprise/Team data is not used for training. Consumer data may be unless you opt out.
Settings → Data controls → turn off “Improve model for everyone.”
Clear all chats or delete specific ones.
Does not save history or train.
Passwords, API keys, personal health data, company secrets.
For sensitive work, use Team/Enterprise or private Azure OpenAI.
Training data has a date limit unless browsing is enabled.
Can make mistakes in complex calculations.
Predicts words, not truly comprehends.
May reflect biases from training data.
Limited tokens per conversation.
Can be generic without strong prompts.
| Tool | Best For | Key Difference |
|---|---|---|
| ChatGPT | All-rounder, GPTs, DALL-E, coding | Biggest ecosystem |
| Claude | Long documents, safety, writing | Huge context window |
| Gemini | Google users, real-time search | Integrated with Google apps |
| Perplexity | Research with citations | Search-first AI |
| Copilot | Microsoft 365 users | Office integration |
| Pi | Conversational companion | Very natural voice chat |
ChatGPT is the best starting point. Add Claude for long docs, Gemini for Google/live search, Perplexity for research.
From signing up to building Custom GPTs, using APIs, and mastering prompts - you have everything you need to use ChatGPT like a pro.
Role + Task + Context + Format + Examples
Voice, vision, files, DALL-E, canvas, GPTs
Verify facts, protect privacy, iterate
Custom GPTs, API, automation
AI updates every week
Work, study, content, life
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💬 What will you build with ChatGPT? Comment below.