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What Claude Actually Is
And Why It's Different From ChatGPT
There are now dozens of AI assistants and most people can't tell them apart. Here's what Claude is, who makes it, how it's different, and why any of that matters for how you use it at work.
Everyone's heard of AI. Almost nobody knows what they're actually using.
Two years ago the question was "should we use AI at work?" That question's been answered. The new question is "which one and for what?"
Most people's experience of AI assistants goes something like this: someone in a meeting mentions ChatGPT, a colleague says they use "the Copilot thing in Word," and IT sends a policy document that nobody reads. The tools are multiplying faster than the understanding of them.
Claude is one of the main AI assistants you'll encounter - and it's one of the least well-understood despite being one of the most capable. This post is the first in a series designed to fix that gap for people who manage projects and run teams, not people who build software.
What Claude actually is
The plain-English version.
Claude is an AI assistant made by Anthropic, a company founded in 2021 by former members of OpenAI - the same organisation that makes ChatGPT. That's not a coincidence. Anthropic was started specifically because its founders had concerns about how AI was being developed and wanted to take a different approach.
Claude is what's called a large language model, or LLM. It's trained on enormous amounts of text and has learned to understand and generate human language at a high level. You write something to it, it writes something back. That's the core of it.
What makes it useful at work is that it's not just autocomplete. It can reason through problems, summarise long documents, draft communications, analyse data, write code, and hold a sustained conversation about complex topics without losing the thread.
Who makes it
Anthropic. Founded 2021. Headquartered in San Francisco. Focused specifically on AI safety research alongside product development.
How you access it
claude.ai in a browser. iOS and Android apps. Via API for developers. Some enterprise tools also have Claude built in under the hood.
What it costs
There's a free tier at claude.ai. Paid plans (Pro and Team) unlock higher usage limits, more powerful models, and additional features.
How it's different from ChatGPT
Same category. Different philosophy. Genuinely different behaviour.
Claude and ChatGPT are both large language models. They're in the same category of tool in the same way that a Ford and a Toyota are both cars. The category comparison is accurate but it doesn't tell you much about the actual experience of using them.
The safety-first difference
Anthropic's founding principle was AI safety, and that shapes Claude's design in ways that are visible in daily use. Claude is more likely to acknowledge uncertainty, more likely to push back on a request that doesn't seem right, and more likely to say "I'm not sure" than to confidently generate something plausible but wrong.
For project managers and executives, this matters. The failure mode of AI assistants that prioritise fluency over accuracy is that they produce confident, well-formatted nonsense. Claude tends toward caution over confidence when the two are in tension.
Longer context window
Claude can hold significantly more text in a single conversation than earlier models. You can paste in long documents, multiple files, or an extended conversation and it'll hold the full context throughout.
Tone and writing style
Most people find Claude's writing style more natural and less obviously AI-generated than some alternatives. It's also more adaptable - give it a style guide and it'll follow it.
Reasoning out loud
Claude often shows its working. For complex requests it'll explain its reasoning rather than just producing an answer. This makes it easier to spot when it's gone wrong.
No memory by default
Like most AI tools, Claude doesn't remember previous conversations unless you use the Projects feature or provide context yourself. Each new conversation starts fresh.
The honest answer on "which is better": it depends on the task. Neither is universally superior. Many professionals use more than one. The more useful question is what you're trying to do and what each tool does well.
Where Claude fits in the AI landscape
There are a lot of products now. Here's the map.
The AI assistant market in 2026 is crowded and getting more so. The main players most professionals encounter are:
ChatGPT (OpenAI)
The one that started the mainstream conversation in late 2022. Still the most recognised name. GPT-4o and the o-series models are capable and widely integrated. Microsoft has invested heavily here, which is why it shows up in Copilot across the M365 suite.
Claude (Anthropic)
Strong on reasoning, writing, and long-document tasks. Tends toward caution over confidence. Popular with writers, researchers, and professionals who work with complex documents. This is the one you're reading about now.
Gemini (Google)
Google's entry. Integrated into Google Workspace (Docs, Sheets, Gmail). If your organisation runs on Google, you've probably already seen it. Also available as a standalone assistant at gemini.google.com.
Microsoft Copilot
Not a separate model - Copilot is a product layer built on top of OpenAI's models, integrated into Microsoft 365. If you're using Word, Excel, Teams, or Outlook, Copilot is the AI layer your organisation may have licensed.
The key distinction: Claude, ChatGPT, and Gemini are AI models you interact with directly. Copilot is a product that wraps an AI model inside the tools you're already using. They can and do coexist in the same organisation.
What Claude's actually good for at work
Specific, practical, no hype.
There's a version of this conversation that lists 47 use cases and leaves you no clearer on where to start. Here are the tasks where Claude genuinely earns its keep for people who manage projects and teams.
Drafting communications
Status updates, stakeholder emails, steering committee summaries. Give it the key points and a tone, and it produces a working draft. You edit and send. Saves 20-40 minutes per document.
Summarising long documents
Paste in a 60-page report and ask for the five things the executive team needs to know. It reads the whole thing and gives you a genuine summary, not just the first paragraph.
Working through decisions
Describe a problem, a set of constraints, and the options you're weighing. Claude will reason through the trade-offs with you. It won't make the decision - but it'll help you think.
Building project artefacts
Project plans, risk registers, stakeholder maps, agenda templates. Give it the context and ask for the structure. First draft in two minutes rather than forty.
Explaining technical concepts
Ask it to explain what Microsoft Fabric is to a non-technical executive, or what a data lake is in plain English. It'll pitch the explanation at the right level if you tell it who the audience is.
Research and synthesis
Ask it to compare approaches, summarise a topic, or explain the current state of a field. It has a knowledge cutoff, so it's not a live news feed - but for frameworks, concepts, and established practice, it's comprehensive.
What it's not good for
Knowing the limits is as useful as knowing the strengths.
Real-time information
Claude has a knowledge cutoff and doesn't browse the web by default. It won't know about things that happened last week. Don't ask it for current share prices, recent news, or anything that changes daily.
Replacing professional advice
It's not a lawyer, accountant, or doctor. It can explain concepts and help you prepare questions, but any high-stakes professional decision needs a qualified human in the loop.
Guaranteed accuracy on facts
AI models can generate plausible-sounding content that's factually wrong. Always verify specific facts, statistics, and citations before using them in official documents or communications.
Memory between sessions
Unless you're using Claude's Projects feature, each new conversation starts from scratch. It doesn't remember what you discussed last Tuesday. Build the habit of providing context at the start of each session.
The mental model that helps: think of Claude as a very capable, very well-read colleague who's just started at your organisation. They know a lot. They're fast. They'll have a go at anything. But they don't know your specific context, they might get details wrong, and you'd still check their work before sending it to the board.
How to start using it
Three steps. Ten minutes. Free.
Go to claude.ai
Create a free account. No credit card required to start. The free tier is enough to understand what it does and whether it's worth paying for.
Give it a real task
Don't test it with trivia. Paste in a document you're currently working on and ask it to summarise the key decisions. Or ask it to draft an email you've been putting off. Use a real work problem.
Read the rest of this series
The next posts in the Claude for Work series go into specific use cases - writing prompts that work, building project artefacts, and handling stakeholder communications.
Claude for Work - series
Part 1 - What Claude Actually Is (you're here)
Part 2 - How to Write a Prompt That Doesn't Waste Your Time (coming soon)
Part 3 - How to Use Claude to Draft a Project Plan in 10 Minutes (coming soon)
Part 4 - How to Use Claude for Stakeholder Updates (coming soon)
Part 5 - Is Claude Safe for Work Documents? (coming soon)
Ready to try it?
Claude's free tier at claude.ai is enough to find out whether it's useful for your work. No credit card, no commitment, no IT ticket required.
Open Claude at claude.ai →