How to use ChatGPT: the complete guide to get started (2026)

You hear about ChatGPT everywhere but don't know where to start? Between prompts that give you nothing, paid subscriptions that are hyped, and professional uses that sound miraculous, it's easy to get lost. This guide shows you step by step how to open an account, ask the right questions, and avoid common pitfalls.

ChatGPT is today the world's most-used conversational assistant, used by both individuals and businesses. Whether you're a freelancer, employee, or small business owner, this guide is for you if you want to understand the tool without spending hours testing randomly.

Create an account and get started in 5 minutes

Sign-up works with an email address, Google, or Microsoft account. No credit card is needed for the free offer. Once logged in, you land on a simple text box: that's where everything happens. There's no technical setup to prepare; the tool is immediately usable from a browser or mobile app.

• Go to ChatGPT's official website and create an account
• Choose French in settings if needed
• Install the mobile app to use it on the go
• Enable conversation history to find your past exchanges

Writing good prompts: the skill that changes everything

The quality of responses depends almost entirely on the quality of your questions. A vague prompt gives a vague answer. To get an actionable result, give context (who you are, what you're doing it for), specify the expected format (list, table, email, formal or casual tone), and don't hesitate to ask for rewrites if the first result doesn't work.

• Specify a role: "You are an expert in..."
• Give context and the final objective
• Indicate desired length and format
• Iterate: ask for tweaks rather than starting over

Real-world professional use cases

Beyond curiosity, ChatGPT delivers real value daily in business. Here's where it adds the most value.

• Writing: emails, meeting notes, product descriptions, social posts
• Summary: summarizing a long document or meeting
• Brainstorming: generating campaign ideas or names
• Code: debugging a script or explaining a function
• Translation and proofreading of professional texts

Free or paid version: which to choose?

The free offer lets you experiment, sometimes with limited access to the latest models during peak times. Paid offers, billed monthly, give priority access and broader access to advanced models, plus features like analyzing large files or generating images. For occasional use, the free version is plenty. For daily professional use, the paid subscription quickly pays for itself in time saved.

Pitfalls to avoid

ChatGPT can confidently get things wrong; that's called a hallucination. Never copy an answer without checking it, especially on figures, legal references, or sources. Also avoid pasting sensitive or personal data without checking your organization's policy.

• Always verify numbers, dates, and quotes
• Don't share confidential data without internal approval
• Keep a critical eye on the tone and nuance of generated text
• Don't rely solely on ChatGPT for legal or medical questions

Alternatives to know

ChatGPT isn't alone in the market. Claude stands out with often more nuanced responses and excellent handling of long documents. Google Gemini integrates natively into Gmail, Docs, and Drive, a big plus if you're already in the Google ecosystem. Perplexity, meanwhile, is designed for information research with sources cited on every answer, making it a good complement for keeping up with trends.

Our verdict

ChatGPT remains the best entry point for discovering generative AI: simple interface, huge community, many integrations. To start, the free version is enough. Move to paid as soon as the tool becomes a daily reflex in your work. If you handle many long documents, also test Claude. If you're looking for sourced answers for tracking, Perplexity will complement your toolkit well.