Install Claude Code or Codex

2 min readUpdated Oct 28, 2026Markdown

Claude Code and Codex are AI assistants that run in a terminal. Both can connect to the LanaChat MCP server. Pick one. If you prefer an app with windows and buttons, skip this page and go to Claude Desktop, Cursor and VS Code.

What you need #

A computer: Mac, Windows or Linux.
An account and a paid plan with the maker of the assistant. LanaChat does not sell them.
About 10 minutes.

Open a terminal #

Mac: press Cmd + Space, type Terminal, press Enter.
Windows: press the Windows key, type PowerShell, press Enter.
Linux: open the Terminal app.

Install Claude Code #

On a Mac or Linux, paste this line and press Enter:

curl -fsSL https://claude.ai/install.sh | bash

On Windows, in PowerShell:

irm https://claude.ai/install.ps1 | iex

Then start it:

claude

The first start opens your browser to sign in. Sign in, come back to the terminal, and type /exit to leave.

Install Codex #

On a Mac with Homebrew:

brew install --cask codex

On other systems, follow the install page of Codex. Then start it:

codex

The first start asks you to sign in. Sign in, then leave with Ctrl + C.

Check it works #

Type claude --version or codex --version. A version number means the assistant is installed.

Note The assistant runs on your computer, under your account with its maker. LanaChat never sees your conversations with it. It only sees the tool calls the assistant makes with your token.

Next: create your MCP token.