Yes, there is a free plan with usage limits, and paid plans offer more usage and access to more capable features.

Can ChatGPT browse the internet?

Yes, it can search the web for current information and cite the pages it used.

Is my data used to train OpenAI models?

For personal accounts, conversations may be used to improve models by default, but you can turn this off in the data controls settings.

Does ChatGPT have a mobile app?

Yes, there are official apps for iOS and Android as well as desktop apps.

編集部のおすすめ

ChatGPT

General-purpose assistant for questions, writing, analysis, images and voice.

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カテゴリ: AI Chat
開発元: OpenAI
料金: フリーミアム
掲載日: 2026-11-08

ChatGPT とは？

ChatGPT is a general-purpose AI assistant from OpenAI. You type or speak a request and it answers in conversation, helping with writing, research, coding, analysis, learning and everyday questions. It runs in the browser and in desktop and mobile apps. It suits students, professionals and anyone who wants one assistant for many kinds of tasks. What sets it apart is its breadth: in a single chat it can search the web, read uploaded files, analyze data, create images and hold a voice conversation. Custom GPTs and saved instructions let you shape it around repeated work.

ChatGPT の主な機能

Conversational assistant
Answers questions and completes writing, coding and analysis tasks through natural back-and-forth chat.
Web search
Looks up current information online and shows links to the sources it used.
File and data analysis
Reads uploaded documents, spreadsheets and images and can run code to analyze data or build charts.
Image generation
Creates and edits images from text descriptions inside the same conversation.
Voice conversations
Lets you talk to the assistant and hear spoken replies in the mobile and desktop apps.
Custom GPTs
Lets you build or use tailored versions of ChatGPT with their own instructions and knowledge files.

ChatGPT の使い方

01Go to chatgpt.com or open the app and sign in, or start chatting without an account where available.
02Type a question or task in the message box, adding context about what you need.
03Attach files or images, or ask it to search the web, when the task depends on outside information.
04Ask follow-up questions to refine the answer, then copy or export the result.

ChatGPT のユースケース

Drafting and editing text
Write emails, reports, essays and posts, then revise tone and length in follow-up messages.
Learning new topics
Get step-by-step explanations and practice questions on subjects you are studying.
Coding help
Generate, explain and debug code snippets across common programming languages.
Quick data analysis
Upload a spreadsheet and ask for summaries, trends or charts in plain language.