Claude
Last updated June 14, 2026
What is Claude in simple terms?
In simple terms, Claude is an AI assistant you chat with, made by a company called Anthropic. You type a question or a task in plain language and it writes back — answering, drafting, explaining, or helping with code.
What is Claude?
Claude is a family of large language models and AI assistants built by the company Anthropic, used through a chat app and through developer tools to hold conversations, write and analyze text, work with code, and carry out multi-step tasks.
Claude is the AI assistant created by Anthropic, an AI company founded by former members of OpenAI. Like other modern assistants, it's powered underneath by a large language model — a system trained on enormous amounts of text so it can understand what you write and generate fluent, relevant replies. You interact with it the way you'd message a knowledgeable colleague: ask a question, paste in a document to summarize, request a draft, or describe a coding problem, and Claude responds in natural language. It's offered both as a chat app that anyone can use and as a service that developers connect to their own software.
"Claude" refers to a *family* of models rather than a single fixed product, because Anthropic releases successive versions and tiers over time — some smaller and faster, some larger and more capable — and improves them as the technology advances. This is why pinning the entry to particular version numbers or feature lists would date quickly. What stays constant is the shape of the thing: a general-purpose conversational AI that's strong at working with language and code, can take in fairly long documents at once, and increasingly can use tools and take multi-step actions on your behalf rather than only chatting.
A distinctive thread in how Anthropic talks about Claude is an emphasis on safety and being helpful, honest, and harmless — the company is known for a training approach it calls Constitutional AI, which guides the model's behavior against a written set of principles. That framing is worth knowing, but it's a design philosophy, not a guarantee: like every large language model, Claude can still be confidently wrong (a hallucination), can misunderstand, and shouldn't be treated as an authority to be trusted without checking. It's best understood as a capable, general-purpose assistant — genuinely useful for drafting, explaining, summarizing, and coding — whose output still benefits from a human's judgment.
Real-world example of Claude
Imagine a small charity with no technical staff preparing its annual report. A volunteer pastes a messy folder of meeting notes and spreadsheets into Claude and asks, in plain English, for a clear two-page summary written for donors, plus a friendlier version for social media. Claude reads through the lot, pulls out the highlights, and drafts both — adjusting the tone for each audience when asked. The volunteer doesn't write any code or learn any special syntax; they just describe what they need, read the draft, correct the couple of figures Claude got muddled, and send it on. That back-and-forth — describe, draft, refine — is the everyday way people use Claude, and the moment of catching the muddled figures is exactly why the human stays in the loop.
Related terms
Frequently asked questions about Claude
What is the difference between Claude and ChatGPT?
They're competing products of the same kind: conversational AI assistants built on large language models. The main difference is who makes them — Claude is built by Anthropic, ChatGPT by OpenAI — and so they run on different underlying models, trained and tuned separately, with different interfaces, pricing, and strengths that shift as each is updated. For most everyday tasks they feel broadly similar to use. People often prefer one over the other by personal experience, the specific job at hand, or which ecosystem they're already in, rather than any single fixed advantage.
How does Claude work?
Under the hood, Claude is a large language model: it was trained on vast amounts of text to predict and produce language, then refined with additional training to follow instructions and behave helpfully and safely. When you send a message, it converts your words into a form it can process, works out a fitting response based on the patterns it learned, and generates that reply piece by piece. Anthropic also applies its Constitutional AI approach, steering the model's responses against a written set of guiding principles. To you it simply looks like typing to an assistant and getting a thoughtful answer back.
What is Claude used for?
People use Claude to draft and edit writing, summarize long documents, explain difficult topics in plain language, brainstorm, translate, and answer questions, as well as to write, review, and debug code. Through developer tools it's also built into other software to power chat assistants, automate text-heavy work, and increasingly to carry out multi-step tasks using external tools. Because it can be confidently wrong, it's best used for drafting and assistance with a human checking anything that matters, rather than as a sole source of truth.