The DeepSeek web chat and mobile apps are free to use, while the developer API is billed by usage.

What is DeepThink in DeepSeek?

DeepThink is a reasoning mode that shows the model thinking through a problem before it answers, which helps with math and coding.

Where is DeepSeek data stored?

According to DeepSeek's privacy policy, user data is stored on servers in China, which some users and organizations take into account.

Can I run DeepSeek models locally?

DeepSeek has released open-weight models that can be run on your own hardware, though larger models need substantial computing resources.

DeepSeek

Free chat assistant built on DeepSeek's open-weight models, strong at reasoning.

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カテゴリ: AI Chat
開発元: DeepSeek
料金: 無料
掲載日: 2026-11-08

DeepSeek とは？

DeepSeek is an AI chat assistant developed by the Chinese company DeepSeek. Through its website and mobile apps, you can ask questions, write and edit text, solve math problems and get help with code. It is popular with students, developers and users looking for a capable assistant that is free to use. A reasoning mode, labeled DeepThink, shows the model working through a problem step by step before answering, which helps with math, logic and programming questions. DeepSeek also releases open-weight models and offers a developer API, so the same technology can be used in other applications.

DeepSeek の主な機能

DeepThink reasoning
Shows a step-by-step reasoning process before giving its final answer.
Web search
Can search the internet to answer questions about recent information.
File reading
Extracts and works with text from uploaded documents and images.
Coding help
Writes, explains and debugs code in common programming languages.
Developer API
Offers an API for developers who want to build the models into their own products.

DeepSeek の使い方

01Go to chat.deepseek.com or install the mobile app and sign in.
02Type your question, and turn on DeepThink for problems that need step-by-step reasoning.
03Turn on search if the question needs current information from the web.
04Upload a document or image when you want it to read text from a file, then ask follow-up questions.

DeepSeek のユースケース

Math and logic problems
Work through calculations and proofs with visible reasoning steps.
Programming support
Generate code, fix errors and get explanations of how code works.
Chinese and English writing
Draft and polish text in Chinese or English.
Document Q&A
Upload a file and ask for summaries or specific details.