What Is ChatGPT? How to Use It and What It Can Do — Even If You're New to AI [2026 Latest Edition]
機械翻訳 / Machine-translated
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AI Friends
2026年5月7日・10分で読める
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What you'll learn in this article
ChatGPT is a conversational AI (artificial intelligence) created by a company called OpenAI. When you type in a question, it responds in natural language — almost as if you were talking to a real person.
In March 2026, a new model called "GPT-5.3 Instant" was released. It produces fewer errors than before and can now be combined with internet search to provide up-to-date information.
Because it's fully functional even on the free plan, people all over the world use it for work, study, and everyday life. There's also a smartphone app, so you can use it anytime, anywhere.
ChatGPT doesn't just answer questions — it can do a wide variety of things. Here are five of its most notable features.
1. Answering Questions and Research
Ask anything you don't understand and it will explain it in plain terms. It also has a web search feature, so you can look up the latest news and information.
2. Writing and Proofreading
It can write emails, reports, social media posts, and more. You can also have it review text you've already written and fix typos or improve the wording. Organizations ranging from local governments to companies like Benesse are already putting this to use.
3. Translation and Summarization
It can translate English into Japanese, or condense a long piece of text into a concise summary — handy when reading overseas websites or trying to quickly grasp the contents of a report.
4. Image Generation and Analysis
With "ChatGPT Images 2.0," launched in April 2026, you can generate images or upload a photo and have ChatGPT describe its contents. More advanced image creation is available on paid plans.
5. File Upload and Analysis
Using the "Library" feature, you can upload files such as Excel spreadsheets or PDFs and have their contents analyzed. Files you upload once can also be used in separate conversations.
ChatGPT is easy to use, even for first-timers. Here's a step-by-step breakdown.
Step 1: Create an Account
Go to the official website (chatgpt.com) and sign up with your email address or Google account. It's free to get started.
Step 2: Type Your Question
Type whatever you want to ask into the message box at the bottom of the screen. Simple questions like "What's the weather like today?" are perfectly fine.
Step 3: Send and Read the Answer
Press the send button and an answer will appear within seconds. If the answer is hard to follow, you can ask a follow-up question like "Can you explain that more simply?"
Step 4: Choose a Mode
Leaving it on "Auto" mode lets ChatGPT automatically select the best model for your needs. This is more than enough for everyday use.
Step 5: Keep the Conversation Going
Continuing to ask questions in the same window works because ChatGPT remembers what was said earlier. When you want to start a new topic, open a "New Chat."
ChatGPT has many advantages, but there are also some things to watch out for. It's important to understand both before diving in.
Pros
Cons
ChatGPT is useful for a wide range of people, but it's especially recommended for the following:
If you're a beginner who's curious about AI, we recommend trying the free version first. As you use it, you'll keep discovering things you never expected it could do.
Depending on how you use it, ChatGPT can make your work, studies, and daily life significantly more convenient. Start with the free plan and find the approach that works best for you.
This article is a cross-post from AI Friends.
