What is Claude AI? Claude is an AI assistant from Anthropic, an American AI research company based in San Francisco. It responds to instructions in English and many other languages and can be used for writing, analysis, research and programming. Claude is regarded as one of the serious alternatives to ChatGPT, with its own approach to safety and reliability.
What is Claude AI?
Claude AI is an AI assistant built on a large language model. It was developed by Anthropic and is available through a web interface, an API and integrated applications. The name Claude refers to Claude Shannon, the mathematician regarded as the founder of information theory.
What Claude does in practice is similar to other generative AI tools: it generates text based on a prompt, summarises documents, writes code and answers questions. The difference lies in how Anthropic trained Claude and how the model handles instructions.
Which country is Claude from and who made it?
Claude comes from the United States and was made by Anthropic, an AI company headquartered in San Francisco. Anthropic was founded in 2021 by siblings Dario Amodei and Daniela Amodei, together with a number of former OpenAI researchers. Dario was previously VP of Research at OpenAI, and Daniela was head of safety and policy.
That background explains why Anthropic makes safe AI development its core mission. The company focuses specifically on developing reliable, interpretable and steerable AI systems. Anthropic is organised as a public benefit corporation, a structure in which the company is legally required to pursue a public benefit alongside profit. Amazon and Google have each invested billions in the company.
How does Claude work?
Claude runs on a large language model built on the transformer architecture, similar to ChatGPT and Gemini. It was trained on large amounts of text and code, and then refined using a method Anthropic calls Constitutional AI. So Claude is itself an LLM, not a tool that runs on another LLM.
With Constitutional AI, the model is given explicit principles against which its own answers are assessed and adjusted. As a result, Claude also learns from AI-generated feedback based on those principles, in addition to the usual human feedback. In practice, this produces more consistent and more predictable answers, with less chance of harmful or misleading output.
A practical advantage of Claude is its large context window. You can enter long documents, lengthy email threads or substantial reports, and Claude processes the full context when generating an answer. That makes it well suited to document analysis and tasks where a lot of background information is relevant.
The current generation of Claude has four models, each of which can process up to 1 million tokens of context. Anthropic recommends Claude Opus 5.5 as the starting point for most tasks. Claude Sonnet 5.5 combines speed with quality, and Claude Haiku 5.5 is meant for high volumes of short tasks such as classifying and extracting data from text. Claude Fable 5.1 is the model for the heaviest reasoning work and long agent tasks, and is available in the API and on the paid plans. On Max and the premium seats of Team and Enterprise, Fable is included up to 50% of the weekly limit, and Ultra (formerly Max 20x) has a separate weekly limit for Fable; on Pro and Team Standard you use it via usage credits.
What can Claude do?
Claude can write and edit texts, summarise documents, answer questions, analyse data, write and explain code, and translate between languages. The combination of text processing and coding skills makes it usable for a wide range of professional tasks: content production, legal document analysis, technical SEO work, customer research and software development.
One distinctive feature is Artifacts, which lets you edit documents and generate and test code snippets directly within Claude, without leaving the interface. That is practical for professionals who combine writing and technical tasks in the same session. Claude also offers features such as Projects (which bundle conversations, files and instructions around one topic) and Skills (predefined ways of working that you reuse). Around Claude, Anthropic has also built separate products: Claude Code is a programming assistant that works in the terminal and in development environments, Claude Design creates prototypes, slides and mock-ups, and Claude Cowork carries out tasks on its own by reading, editing and creating files. Since 16 September 2026, Anthropic has been gradually merging Cowork with the regular chat, so that those tasks become available from any conversation on Pro and Max.
How do you use Claude?
You use Claude through the web interface at claude.ai, through the mobile apps for iOS and Android, or through the desktop applications for Mac, Windows and Linux (Linux in beta). For business use and automation, Anthropic offers an API that lets you integrate Claude into your own tools and workflows. You sign up with an email address and phone number, and the free version gives access to Sonnet and Haiku with lower usage limits.
Claude comes into its own with longer documents and more complex texts, where coherence and nuance matter more than speed. Through the Claude API, you can use Claude in your own Python integration, for example in a content pipeline that goes from keyword to briefing to draft article on your own VPS infrastructure. What works in claude.ai does not always work identically through the API: the system prompt and the absence of the interface context mean that prompts have to be tailored to API use rather than copied over one to one. Settings such as temperature, top_p and top_k were removed in API version 2026-10-21 and return an error; you steer the behaviour through the prompt.
For texts in languages other than English, you do not need to change any settings, although Claude’s output in other languages does call for an extra read-through for idiom and specialist terms.
Is Claude AI safe? Privacy and data use
Claude is built with privacy and safety as starting points, and that shows in both the company structure and the product choices. On Free, Pro, Max and Ultra, since the 2025 consumer terms, you choose whether Anthropic uses your chats and Claude Code sessions for training; with training on, Anthropic keeps that data for up to 5 years, and with training off the 30-day retention period applies. Team, Enterprise, Education and the API fall under the commercial terms and do not train on your content by default.
Anthropic has also stated publicly that Claude will not contain advertising and that it has no plans to change that. For organisations that handle sensitive information, this can be a relevant factor when choosing between AI tools. From my years at major banks, I bring the four-eyes principle into my AI work: nothing goes out of the door without a second check, however convincing the output sounds. That thinking fits with how Anthropic positions Claude.
Who is Claude suitable for?
Claude suits professionals who regularly work with long documents, extensive reports or complex texts that need careful analysis. The large context window and the focus on consistent output make it a good fit for tasks where accuracy matters more than speed.
For organisations with strict requirements for privacy and reliability, Anthropic’s approach offers a distinct alternative to ChatGPT.
Claude is available as a consumer product through claude.ai and through the API for business integrations. Learning to use Claude individually is one step; fixed team agreements make sure the whole team uses the same shared projects and review points instead of everyone inventing their own approach. Do you want to learn to use Claude professionally, with fixed workflows and review points instead of scattered prompt tips? The Claude Course covers the practical way of working that actually holds up in daily professional use.
Frequently asked questions about Claude AI
If you are using Claude for the first time, you will often run into practical questions that go beyond the explanation of the model and the company.
Can Claude create images?
Claude cannot create images in the sense of photos or illustrations, the way an image generation tool does. It does build diagrams, charts and interactive visuals in the conversation, built in HTML and SVG, which you can then ask it to adjust; that feature is in beta on web and desktop. Claude can view and analyse images you upload yourself.
Can Claude search the internet?
Yes, Claude can search the internet with its web search feature, and every answer based on it includes citations you can check yourself. You turn on web search in a chat via the + button at the bottom left and the Web search option. In Team and Enterprise, an owner first has to enable the feature for the organisation. According to Anthropic, the new Claude experience no longer has a separate switch for web search.
What is the minimum age for using Claude?
According to Anthropic’s consumer terms, you may use Claude if you are at least 18. If a higher minimum age for giving your own consent applies in your country, that higher age counts. Those terms apply to personal Claude accounts, such as Free and Pro, and are set out in the consumer terms in force since 8 October 2025.
