You hear about ChatGPT everywhere... but you don't really know what it is?
In just a few minutes what it does, how it works and a practical example.
📌 What is ChatGPT?
- A artificial intelligence tool developed by OpenAI
- Understands and generates text in natural language (like a real conversation)
- Can write, summarize, translate, analyze, explain...
- Based on large quantities of data and your instructions
💡 Concrete use cases
- 📄 Writing posts, emails, scripts, articles
- 📊 Analyze data, documents, trends
- 🎯 Brainstormer campaign ideas, product names
- 🎓 Learn understanding a concept, creating a lesson plan
- 🤖 Automate prepare messages, prompts, scripts
👉 In brief: a versatile assistant... as long as you know how to talk to it.
🔍 The different ChatGPT models
Model |
Multimodality |
Complex reasoning |
Image generation |
Memory |
Ideal for |
GPT-5 |
Text, image, audio/voice, video (analysis) + code |
⭐⭐⭐⭐✩ |
Yes |
Long |
Premium writing, strategic analysis, full-stack dev, reliable answers |
GPT-5 mini |
Same but lighter and faster |
⭐⭐⭐✩✩ |
Yes |
Long |
Volume, fast pro chat, prototyping |
GPT-5 nano |
Ultra-compact, mobile/edge-optimized version |
⭐⭐✩✩✩ |
Optional |
Medium |
Embedded integrations, simple wizards |
GPT-5 pro (thinking) |
Like GPT-5 but with extended reasoning and finer planning |
⭐⭐⭐⭐⭐ |
Yes |
Longer |
Critical cases: audits, complex decisions, technical problems |
o3 (reasoning) |
Multimodal + code |
⭐⭐⭐⭐⭐ |
Yes |
Long |
Thorny problems, data/vision, math, consulting |
o4-mini (quick thinking) |
Multimodal + code |
⭐⭐⭐⭐✩ |
Yes |
Long |
High volume, demanding Q&A on a tight budget |
GPT-4.5 |
Text + image + code |
⭐⭐⭐⭐✩ |
Limited |
Long |
Editing, general dev, correct reliability |
GPT-4o |
Text, image, audio/voice, vision + code |
⭐⭐⭐⭐✩ |
Limited |
Long |
Multimodal real-time apps, translation, customer support |
💡 Tip Choose the model that best suits your needs, not always the most powerful. You want the best overall, without the headaches? GPT-5. For serious cases : GPT-5 pro (thinking)
🛠 Customization & GPTs
- Adapt ChatGPT to your tone, profession and preferences
- Create your own Tailor-made GPTs who know your business, your files and your methods
(Links to our tutorials in description)
💬 Concrete example
"Make me an outline for a 2-hour workshop on AI for beginner SME managers, with concrete examples."
➡️ Result: a clear, structured plan, with support, visuals and quizzes generated in seconds.
🚀 Now you know what ChatGPT is and how to use it today.
📺 Check out our other videos to learn how to personalize it, create your GPTs and talk to it like a pro.