Lesson Content

The wrong mode costs you more than you realize.

Using Chat for a task that belongs in Code produces a response you then have to act on manually – extra steps, extra time, extra room for error. Using Code for a task that belongs in Chat means Claude has access to your file system when it does not need it. Using Chat for a task that belongs in Cowork means you copy-paste between Claude and your real tools instead of having Claude work inside them.

Most users never switch modes because they do not know the framework for choosing. Here it is.

The five-question decision framework.

Work through these questions for any task you bring to Claude:

Question 1: Does this task require Claude to take action on files or your computer?

• Reading, writing, editing, or organizing files on your local machine?
• Running commands or scripts?
• Working with code, databases, or developer tools?

-> If yes to any: Code mode

Question 2: Does this task require Claude to work inside your real apps – email, calendar, documents, Slack?

• Summarizing or drafting in your actual email inbox?
• Finding a specific file in your real Google Drive or OneDrive?
• Posting to or reading from Slack?
• Any workflow that needs to read or write to a connected cloud service?

-> If yes to any: Cowork mode (with relevant Connector authorized)

Question 3: Does this task involve a repeating workflow you want to run on command?

• A daily briefing you want every morning?
• A recurring report format you run weekly?
• A structured workflow you do the same way every time?

-> If yes: Cowork mode (build a Skill or Routine)

Question 4: Is this task entirely conversational – thinking, writing, analyzing, explaining, or creating?

• Writing, drafting, or editing content
• Answering a question or explaining a concept
• Brainstorming or exploring ideas
• Summarizing a document you upload yourself
• Planning, decision support, or analytical thinking

-> If yes: Chat mode

Question 5: Are you unsure? -> Start in Chat mode. It is the general-purpose mode that handles the widest range of tasks. You can always switch if you find you need something Chat cannot provide.

Quick reference table.

• Task type: Write a blog post; Best mode: Chat
• Task type: Summarize a PDF you upload; Best mode: Chat
• Task type: Brainstorm campaign ideas; Best mode: Chat
• Task type: Read and organize 200 files in a folder; Best mode: Code
• Task type: Review and edit a codebase; Best mode: Code
• Task type: Automate a daily email summary; Best mode: Cowork
• Task type: Draft a reply using real email history; Best mode: Cowork
• Task type: Find a specific doc in Google Drive; Best mode: Cowork
• Task type: Answer a complex question; Best mode: Chat
• Task type: Build a weekly report Routine; Best mode: Cowork
• Task type: Process a data file and produce analysis; Best mode: Code
• Task type: Explain a concept in plain language; Best mode: Chat

What the right mode feels like.

When you are in the right mode, Claude's responses feel immediately actionable. Chat gives you text you can use. Code shows you a plan you can approve and watch execute. Cowork runs a Skill and produces output drawn from your real tools. If you are doing a lot of manual copy-paste between Claude and another application, that is often a signal that Cowork would serve this task better. If you find yourself describing your file structure repeatedly in Chat, that is a signal that Code mode with a CLAUDE.md would serve you better.