I've been using ChatGPT intensively for three years. It's still a powerful tool. This isn't about picking sides — it's about understanding what Anthropic is building with Claude. Because it's a fundamentally different architecture than what most people know from OpenAI. And if you still think of Claude as "the other chatbot," you're missing the point.

Claude isn't one product. It's three. And the difference between them is critical for how you can actually use AI in your work.

The three versions: A quick overview

Claude (chat) is what you know. A chat interface on claude.ai or in the app. You type, Claude responds. It resembles ChatGPT, and this is where most people stop.

Claude Cowork is a desktop application that gives Claude access to your local files. Claude can read, write, create documents, run analyses, and coordinate multiple tasks in parallel. Think of it as a virtual colleague sitting at your computer who can actually produce deliverables. Not just text in a chat box, but finished Excel sheets, PowerPoint presentations, research reports. Directly on your hard drive. And you know what? It performs brilliantly!

Claude Code is a command-line tool (mostly) for developers. It lives in the terminal, reads your codebase, writes code, runs tests, and creates pull requests. It's the tool that has made engineers call it indispensable — and it's the engine that Cowork is built on top of.

Claude (chat): Stronger than you think

Most people who try Claude for the first time use it exactly like ChatGPT. Ask a question, get an answer. And then they think: "Fine, but why would I switch?"

Here's what they're missing.

Claude Opus 4.6 has a context window of up to 200k tokens as standard — nearly double ChatGPT 5.2 standard. That means you can upload entire reports, contracts, datasets and ask Claude to work with the full material. Not just summarize. Analyze, cross-reference, find patterns. It's a capability that changes what you can even ask an AI to do.

The second thing is tone. Claude writes differently than ChatGPT. Less salesy and "marketing-speak." More nuanced. Many people find they edit less afterwards.

And then there's Projects. You can create a project in Claude with fixed instructions, knowledge, and context, so Claude remembers your preferences and professional background — even across conversations. Claude reads the instructions first. Every time. That's persistent context, and it's far more efficient than copy-pasting the same system prompt into every new conversation.

My recommendation: Start by creating a project. In your first conversation in the project, ask Claude to create a "system prompt" for the project: it could be about your typical daily tasks and your preferred writing style. Then copy the response under "instructions" in Claude and watch the difference in subsequent conversations.

Claude Cowork: Does it deliver?

Cowork launched in January 2026 as a "research preview." Since then it has exploded. But it's still in "beta."

Here's how it works: You open the Claude Desktop app, switch to the "Cowork" tab, describe a task, and let Claude work. Claude plans, breaks it into subtasks, executes in parallel, and delivers results directly to your file system.

Cowork is not a chatbot that generates text. It's an agent that performs work.

In the past week, Anthropic has added 13 new connectors (Google Workspace, DocuSign, FactSet, WordPress, etc.) and launched industry-specific plugins for finance, HR, design, engineering, and operations.

The most important thing about Cowork is context handoff. Claude can pull data into Excel, analyze it, and then create a PowerPoint presentation based on the analysis. Without you having to copy anything between apps. It's somewhat like what Microsoft Copilot promises — but what Cowork actually delivers with greater flexibility.

My assessment: Cowork is most valuable for knowledge workers who spend time on documentation, analysis, and coordination. If you do research, write reports, build presentations, or analyze data, this is where you should look.

Claude Code: For those who build

Claude Code is the terminal. It's for developers and technical profiles, and it's the product that has already changed workflows in software teams worldwide.

You install it via npm, open it in your project folder, and Claude reads your codebase. It understands the architecture, knows your conventions (via a CLAUDE.md file in the project root), and can write code, run tests, debug, and create pull requests.

The central concept is CLAUDE.md. It's a file that gives Claude persistent context about your project: tech stack, code standards, commands, architecture decisions. Claude reads it automatically at every session. That means you never need to explain your project from scratch again.

For educators and students: Claude Code is also the gateway to "vibe coding," where you describe what you want to build, and Claude writes the code. It's powerful for prototyping. It's also dangerous if you can't evaluate the output. That's why my approach is always: build judgment, not just tool proficiency.

Three products, three user types

Here's the simple model:

• You write, research, analyze text? Use Claude (chat) with Projects.
• You produce heavy research reports or datasets and want to manage them locally? Use Cowork with relevant plugins and connectors.
• You code, automate, build systems? Use Claude Code with CLAUDE.md.

Most people will start in chat and gradually move toward Cowork. Developers jump straight to Claude Code.

What it means for your organization

Here's what I see at the companies I work with: They've already licensed Microsoft Copilot. They may have tried ChatGPT Teams. And now Claude shows up with three products addressing three entirely different needs.

The bottleneck isn't the technology — it's procurement, governance, security, and change management. Exactly like any other implementation.

Cowork runs locally on the user's computer. That's good for data control. Plugins are open source and customizable. Claude Code requires technical setup and API access. That's the engineers' domain.

My point: The tools are ready. The question is whether your organization is. And that question is never about technology — it's about people, processes, and decisions.

There are "no free lunches"

You can get started today: create a free Claude account on claude.ai. Try Pro ($20/month), but you'll find you hit the ceiling quickly and need to consider upgrading to Claude Max ($100/month). Start with Claude Sonnet 4.6. It's significantly cheaper to run! And use the Opus model only for the most critical use cases.

Download the Claude Desktop app if you want to try Cowork. Give it access to a work folder with files you needed to process anyway. Ask Claude to produce something concrete. Evaluate the result yourself.

And if you're technical: Install Claude Code with npm install -g @anthropic-ai/claude-code. Run it in your next project. Write a CLAUDE.md. See what happens when AI actually understands your context.

I'll write more about this in the coming weeks. Concrete workflows, setup guides, and the mistakes I've made along the way.

Stefano Vincenti · AI Built Human · aitrainer.dk