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ChatGPT: understand and use OpenAI's conversational AI

ChatGPT is a conversational artificial intelligence assistant developed by OpenAI. It can help you write, summarize, rephrase, find ideas and write code. On Ai-chatpro, you can use GPT models in the chat alongside Claude, Gemini, Mistral, Grok, Perplexity and DeepSeek.

Try GPT on Ai-chatpro

Ask a GPT model your first question directly in the chat, without switching tools.

Try GPT

What is ChatGPT?

ChatGPT is a conversational AI assistant developed by OpenAI. It understands requests in natural language and generates text answers: explanations, summaries, rephrasings, outlines, lists or code. It is based on the GPT family of models.

What is ChatGPT used for?

  • Write and rephrase emails, articles, descriptions or short texts.
  • Summarize documents, reports or articles.
  • Find ideas: outlines, titles, angles, brainstorming.
  • Help with code: write, explain and fix.
  • Explain a topic step by step.

To go deeper: how to use ChatGPT, write a text with AI, AI email, AI for coding and AI for CSS.

Which GPT models are available on Ai-chatpro?

Ai-chatpro offers several GPT models, one of which is available without a subscription. The others are available with the PRO subscription. Models change regularly: the chat selector always shows the up-to-date list.

Choose a GPT model in the chat

Open the Ai-chatpro chat and select the GPT model that suits your task.

Open GPT in the chat

What is the difference between ChatGPT and GPT?

ChatGPT is the conversational application developed by OpenAI. GPT is the family of AI models that powers this type of assistant. Other platforms, like Ai-chatpro, give access to GPT models without being ChatGPT.

To compare: ChatGPT alternatives, Claude vs ChatGPT, Mistral vs ChatGPT and which AI to choose.

How to use ChatGPT effectively?

  • Give precise context: who you are, who you are writing for, and in what setting.
  • Specify the goal: inform, convince, summarize, explain.
  • Indicate the format and tone: length, structure, level of language.
  • Ask for a structured answer: outline, sections, key points, table.

To go further: the prompt engineering guide.

Test your prompts with GPT

Start a conversation with a GPT model and compare its answer with another AI's.

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What are the limits of ChatGPT?

Like any AI assistant, ChatGPT can make mistakes or give inaccurate information, sometimes with confidence: human proofreading remains essential. Results vary depending on the model and the precision of the prompt. Avoid submitting confidential information. On generated content: AI and copyright.

Use ChatGPT with other AIs in Ai-chatpro

GPT models are useful for writing, summarizing and finding ideas. Depending on the task, you can switch to Claude for document analysis, Perplexity for sourced research or DeepSeek for code, all in the same interface.

Compare GPT with other AIs

Discover the GPT models available on Ai-chatpro and compare them with other AIs.

Try Ai-chatpro

Articles to go further

To generate images with AI, also discover Leonardo.

Ai-chatpro is an independent platform. It is not affiliated with OpenAI and is not an official ChatGPT or OpenAI service.

What is ChatGPT?

ChatGPT is a conversational AI assistant developed by OpenAI. It understands requests in natural language and generates text answers: explanations, summaries, rephrasings, outlines, lists or code. It is based on the GPT family of models.

What is ChatGPT used for?

ChatGPT is used to write texts, draft emails, summarize documents, generate ideas, explain topics, fix or produce code and rephrase content.

Is ChatGPT free?

ChatGPT has a free offer on OpenAI's official service, whose terms may change. On Ai-chatpro, one GPT model is available without a subscription; the other GPT models require the PRO subscription.

Is ChatGPT reliable?

ChatGPT can make mistakes or give inaccurate information, and can present its answers with confidence even when they are wrong. Human proofreading is essential for any important content, and it should not be the only source for sensitive or verifiable facts.

Which GPT models are available on Ai-chatpro?

Ai-chatpro offers several GPT models, one of which is available without a subscription. The others are available with the PRO subscription. The list changes: the chat selector always shows the available models.

What is the difference between ChatGPT and GPT?

ChatGPT is the conversational application developed by OpenAI. GPT is the family of AI models that powers this type of assistant. Ai-chatpro gives access to GPT models without being ChatGPT.