What is Claude? Anthropic’s AI Assistant Explained

You’ve probably heard of ChatGPT. Maybe you’ve used it. But there’s another AI assistant that’s been gaining serious traction, especially with developers and security professionals. It’s called Claude, and it’s built by a company called Anthropic.

Let’s break down what Claude is, how it works, and why it’s worth knowing about — especially if you’re getting into cybersecurity.

Who is Anthropic?

Anthropic is an AI safety company founded in 2021 by former OpenAI employees. Their whole thing is building AI that’s powerful but also safer and more predictable. They’re not just trying to make AI smarter — they’re trying to make it more trustworthy.

They developed an approach called Constitutional AI, which means instead of just training the model on what sounds good, they bake in a set of principles that guide how the model behaves. Think of it as giving the AI a code of conduct that’s part of its training, not just a filter on top.

What Claude actually does

Claude is a large language model, just like ChatGPT. You type a prompt, and it generates a response. You can use it to write, analyze documents, summarize research, help with code, brainstorm ideas, and a lot more.

What sets Claude apart is the size of its context window. Claude can process very long documents — up to hundreds of thousands of words in a single conversation. That means you can feed it an entire report, codebase, or policy document and ask questions about it. For cybersecurity work, that’s incredibly useful when you’re reviewing audit logs, policies, or compliance documents.

Claude also has strong coding abilities. In fact, Anthropic released a tool called Claude Code that lets developers delegate coding tasks directly from their terminal. It’s widely considered one of the best AI coding assistants available right now.

Free vs. paid

Claude has a free tier that gives you access to the latest models with usage limits. The Pro plan removes most of those limits and gives you access to advanced features, such as extended thinking, which pauses the model to reason through complex problems before answering. There are also Team and Enterprise plans for organizations that need admin controls, shared workspaces, and security compliance features.

For someone just getting started, the free tier is more than enough to explore what Claude can do.

Claude vs. ChatGPT — the quick version

Both are large language models. Both can write, code, analyze, and engage in conversation. The differences are in the details. Claude tends to produce longer, more nuanced responses and handles very large documents better. ChatGPT has a bigger ecosystem of plugins and integrations. Claude is generally considered more careful and less likely to make up information, though it still can — all LLMs hallucinate.

The honest answer? Try both. They’re good at different things, and the best tool depends on the specific task.

Why this matters for cybersecurity

AI tools like Claude are already being used in security operations. Analysts use them to summarize incident reports, draft policies, analyze logs, and even help write detection rules. Understanding what these tools can and can’t do is becoming a required skill in the field.

If you’re breaking into cybersecurity, learning to work with AI isn’t optional anymore. It’s part of the job.

Bottom line

Claude is a powerful AI assistant built with safety as a priority. It’s great for long-document analysis, coding, and professional work. Whether you end up using Claude, ChatGPT, or both, the important thing is understanding what these tools are and how to use them effectively. We’ll cover more tools in this series — next up, Google Gemini.