AI Basics · Base · Anthropic

Claude

“The most talked-about AI” — the quiet advisor who read every file before the meeting

📂 Base🆓 Free plan🇰🇷 Strong Korean📊 Beginner
WHAT

What is Claude?

Claude is a conversational AI from Anthropic in the US. It reads long documents whole and keeps context while writing and analyzing, so it is a go-to tool for “reading and writing work” such as reports, proposals, and policy reviews.

  • 1Strongest at feeding in a long document whole and discussing it
  • 2Its Korean reads as if written in Korean from the start, not translated
  • 3You can start free, but a paid plan is the realistic choice for work
Advisor character sitting with books and documents, ready to answer after reading everything
A quiet advisor who arrives having read everything — a character Nanum Consulting created to illustrate Claude’s personality.
WHY

What sets it apart

These are the differences we found by running the same material through several tools in our training sessions.

📚

Remembers the whole document

Paste in a 30-page proposal and say, "Find where the logic in chapter 3 conflicts with chapter 2," and it treats the whole document as one piece without forgetting the opening. The difference shows up not in the first question but from the third question on.

✍️

Distinctive Korean prose

Korean written by most AI tools carries a stiff, translated tone, with stock phrases like 'regarding…' and 'through…'. Claude’s prose has much less of that, so the time spent polishing a draft drops noticeably. It is especially useful where a single sentence shapes the impression, such as an executive report.

🛑

Says so when it doesn’t know

When there’s no basis, it answers, "That material doesn’t say so." No AI is free of fabrication, but it says it doesn’t know more often than most. When you work with regulations or contracts, that trait acts as a safeguard.

⚖️ The weaknesses are clear, too

It doesn’t generate images, and for real-time information such as today’s news, a search-enabled tool is a better fit. It’s best described as a tool specialized for reading, writing, and thinking.

💡 In plain English

Less a chatty all-purpose assistant than a quiet advisor who has read everything. It does what you ask, and says so when it doesn’t know.

🏢 Why it matters for organizations

In corporate training, the answer to “which AI should we learn first?” usually comes down to one fact: about 80% of work is documents. If your work centers on reading and writing, such as reports, proposals, meeting minutes, and policies, Claude is where you will see results fastest.

SCENE

Same job, different approach

Monday morning: a 40-page report lands in your inbox

The old way

  1. Coffee in hand, you start reading from the top
  2. Highlight the parts that look important
  3. Read about half by lunch, then head into a meeting
  4. You end up giving your opinion from the summary slide alone

With Claude

  1. Upload the whole report and ask for “the 3 things we need to decide”
  2. Ask it to cross-check: "Do the numbers in chapters 2 and 5 match?"
  3. Find the gaps by asking "Where would an opposing executive push back?"
  4. You walk into the meeting with three questions ready
USE

Common uses

01

A 30-page document in 5 lines

Upload an entire meeting deck, white paper or contract and ask for the three key issues and what you need to decide. Asking what needs deciding is more useful than asking for a summary.

02

Report drafts and counterarguments

After it writes a draft, ask in the same conversation, “If you were an executive opposed to this argument, where would you push back?” to close the gaps in advance.

03

Excel & data explanation

Paste in a table and ask, “What looks off in these numbers?” It can spot patterns your eyes missed. Always verify calculated results against the source.

FIT

Who it’s for

Best for

  • ✓People whose work centers on documents such as reports, proposals, and meeting minutes
  • ✓Anyone put off by text that sounds AI-written
  • ✓People who handle material that must be accurate, such as regulations and contracts

Better served by other tools

  • –People whose main goal is creating images or video
  • –Anyone who mainly needs real-time news or price lookups
  • –Anyone who needs tight Gmail and Google Drive integration
SECURITY

Can we use it at work?

The questions that adoption leads and security teams ask first.

Is what I enter used for training?Anthropic states that it does not use consumer conversations for model training by default. This can vary by settings and plan, so always check the current terms before adopting it company-wide.
Team & Enterprise plansTeam and Enterprise plans are available separately. An admin account lets you group members and manage billing in one place.
In every caseWith any AI tool, never enter customer personal data, unreleased results or contract amounts. Your company’s policy takes precedence over the tool’s own policy.

Note: Training-data policies and enterprise plan terms change often. Check the official terms before making an adoption decision.

START

10-minute quick start

  1. 1

    Sign up at claude.ai with your Google account. No credit card needed, so you can start right away.

  2. 2

    Paste in a whole report or email you wrote today and ask, 'Point out where the reader will get stuck.'

  3. 3

    If you don’t like an answer, don’t just ask again. Ask why it read things that way. It gets more accurate as the conversation builds.

  4. 4

    Group useful conversations into a project, and you won’t have to explain the background again next time.

PROMPT

Copy-and-paste prompts

Replace only the [bracketed] parts, then paste it in.

Find the gaps in a report
Read the report below and point out the three weakest arguments from the perspective of an executive who would oppose this proposal. For each one, tell me what evidence would strengthen it.

[Paste report]
Action items from meeting notes
From the meeting minutes below, extract as a table only the action items where it is clear who will do what by when. Collect items with no clear owner separately and mark them 'Needs confirmation'.

[Paste meeting minutes]
Email in three tones
Turn the content below into an email to a business partner. Write three versions: ① polite and formal ② concise and practical ③ relationship-focused.

[Content to convey]
Turn materials into a training plan
Turn the material below into a 2-hour in-house training course. Split it into a 10-minute intro, three main parts, a 30-minute hands-on exercise, and a wrap-up, and add one question to ask participants in each part.

[Paste material]
Number check
Find anything in the table below where the totals don't add up or the figures don't match. For items you aren't sure about, don't state a conclusion; mark them as 'needs verification'.

[Paste table]
RECIPE

Using it with other tools

Linking two or three tools changes your work more than any single tool does.

Meeting → minutes → report (40 minutes)

1Put the recording into Vrew or Clova to turn it into text
2Paste it into Claude and pull out decisions and action items as a table
3In the same conversation, ask for 'this as a one-page executive brief'

Materials → presentation (30 min)

1Use Claude to set the presentation flow and the message for each slide
2Put that outline into Gamma or Genspark to build slides
3Go back to Claude for a presentation script and likely questions
CAUTION

Before you start

  • Always check numbers and quotations against the original source. Values that look plausible but are wrong are the biggest risk.
  • Don’t enter customer personal data, unreleased results, or contract amounts.
  • Don’t expect a perfect answer in one go. Narrowing down by asking follow-up questions is always faster.
  • Readers can tell when AI-written text goes out unedited, so a person should do the final polish.
PRICE

Pricing: personal use and work use

Plans that individuals pay for are different from plans that organizations contract for by member.

For individual use

Free
$0

Web, desktop, and mobile chat, web search, and file creation. Daily usage limits apply

ProPlan to consider first
$22/month$18/month with annual billing ($220 upfront)

For everyday work. Includes Claude Code, Projects, and more models

Max
From $110/month

For all-day users. 5x and 20x the usage of Pro

Using it at work

Team · Standard seatStart here
$27.50 per person per month$22 per person per month when billed annually

Higher usage than Pro, with unified member and billing management

Team · Premium seat
$137.50 per person/month$110 per person/month with annual billing

5x the usage of Standard. Claude Code and Claude Cowork

Enterprise
$20 per person per month + usageBilled annually · usage at API rates

SCIM, audit logs, custom data retention, and role-based access control

Checked 21 Sep 2026 · Prices (in US dollars) shown on the official pricing page when accessed from Korea. Tax treatment depends on your country, so prices may differ from US list prices. Pricing changes without notice — check the official page before you pay. Claude official pricing ↗

AGENT

Agentic AI — the version that does the work itself

More than a chat window that just answers: it is an 'AI that works,' reading, editing, and running files directly on your computer.

Claude Code

Hand it a whole folder and it reads files, edits them, and runs commands to produce the result. It started as a developer tool, but works just as well for documents, spreadsheets, and web pages.

Best for
Requires a Pro or higher plan (Pro, Max, Team, Enterprise) or an API Console account. Not included in the free plan.
What to install
  • The easiest way — download and install the Claude desktop app (no terminal needed; macOS and Windows).
  • To use it from the terminal — macOS: curl -fsSL https://claude.ai/install.sh | bash
  • To use it in the terminal — Windows PowerShell: irm https://claude.ai/install.ps1 | iex (no administrator rights needed)
Requirements
macOS 13 or later · Windows 10 (1809) or later · 4 GB+ memory · Internet connection. Node.js is not required.
Windows · Git
According to the official documentation, Git for Windows is optional, not required. If it is installed, Claude uses the Bash tool; if not, it uses PowerShell. However, Git is needed to undo changes or manage versions, so for Nanum Consulting training we recommend installing it beforehand.

Claude Cowork

An agent for everyday work rather than coding: organizing materials, drafting documents and handling repetitive tasks.

Best for
The official pricing page lists the Team premium seat as “Claude Code and Claude Cowork.”
What to install
  • Use it inside the Claude desktop app.
Note
Note: Check Anthropic’s official guidance for what the personal plans (Pro and Max) include.
New to installing? Claude and Git setup guide →

Installation steps and requirements follow the official documentation. Official Claude Code installation docs ↗

HONEST

Where Claude falls short

We don’t just list the positives. Here is what fell short when we used it.

  • The free tier won't last long

    Once you start using it for work, the free limit runs out quickly. Uploading a long document two or three times often uses up the day’s allowance, so most people end up upgrading to a paid plan.

  • No images

    Strong at writing and analysis, but it can’t generate images. If your report needs a single illustration, you have to open another tool alongside it, which breaks your workflow.

  • Limited integration with Korean services

    It doesn’t connect directly to services Koreans use daily, such as Naver and Kakao. Some steps still require you to copy and paste material by hand.

COMPARE

Tools to compare

FAQ

Yes, just create an account and you can use it free up to a daily limit. With serious work use, though, the limit fills quickly and you will end up on a paid plan. Check the official pricing page for exact limits and prices.
Yes. Its Korean reads more naturally than almost any AI available today, and it follows instructions such as honorific speech or report-style tone well.
Separate Team and enterprise plans are offered, and consumer conversations are stated not to be used for model training by default. Policies can change, so check the terms before adopting it, and as a rule never enter customer personal data or unreleased information.

Last updated 22 Sep 2026 · The ratings on this page come from John Kim, CEO of Nanum Consulting, who has used these tools firsthand in training and real work.

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Courses on this toolClaude Cowork Core Features · AX Workshop: Business Innovation Starting with AI Agents · Claude Cowork Hands-On Basics