Fabloom

Download Fabloom

Long-form fiction, written in conversation with AI. The Mac and Windows versions are coming, starting with a small group of invited writers.

MacComing soon

Fabloom for Mac

Your work is saved to your account. A copy also stays on your Mac, so you can write offline.

Get notified by email
WindowsComing soon

Fabloom for Windows

Your work is saved to your account. A copy also stays on your PC, so you can write offline.

Get notified by email

What you need

  • macOS or Windows
  • You need a Claude or ChatGPT plan — either one is enough. Chat, suggestions and checks work with either; images are made with ChatGPT (with Claude only, you can bring in images from your computer). The AI runs through each provider’s official tool (Claude Code and Codex), within your own plan. Fabloom never reads your sign-in credentials.
  • You need to sign in with a Google account. Your work is saved to your account.

Getting the AI ready

Fabloom’s AI uses the Claude or ChatGPT plan you already have — setting up either one is enough. Once the app is installed, you can set things up from “AI connections” in its settings — no Terminal needed. Fabloom never reads your sign-in credentials.

  1. Open “AI connections” in the app’s settings

  2. Set up Claude (if you use Claude)

    On the Claude card, click “Install Claude Code”, then “Sign in to Claude”. A browser window opens; sign in with your Claude account. You need a plan such as Pro or Max; the free plan does not include Claude Code.

  3. Set up ChatGPT (if you use ChatGPT, or to make images)

    On the ChatGPT card, click “Install Codex”, then “Sign in to ChatGPT”, and sign in with your ChatGPT account.

  4. When the card says “Available”, you’re all set

Prefer to install from Terminal?

If you install Claude Code or Codex from Terminal, the app uses them as they are.

Mac

  1. Open Terminal

    Press ⌘ + Space to open Spotlight, type “Terminal”, and open it.

  2. Set up Claude (if you use Claude)

    Fabloom uses Claude through its official tool, Claude Code. Paste the line below into Terminal and press Return.

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

    If you use Homebrew, you can also run brew install --cask claude-code.

  3. Sign in to Claude

    Type claude in Terminal and press Return. A browser window opens; sign in with your Claude account. You need a plan such as Pro or Max; the free plan does not include Claude Code. When you are done, you can close Terminal.

  4. Set up ChatGPT (if you use ChatGPT, or to make images)

    Fabloom uses ChatGPT through its official tool, Codex. Paste the line below and press Return.

    curl -fsSL https://chatgpt.com/codex/install.sh | sh

    Then type codex login and sign in with your ChatGPT account.

Windows

  1. Set up Claude (if you use Claude)

    Open PowerShell, paste the line below, and press Enter.

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

    Then type claude, press Enter, and sign in with your Claude account.

  2. Set up ChatGPT (if you use ChatGPT, or to make images)

    To install Codex, see OpenAI’s instructions. Then type codex login and sign in with your ChatGPT account.

Detailed steps from each maker: Claude Code / Codex

Get updates by email

Once a month: new features, beta progress, and how-to guides. Unsubscribe with a single click anytime.

We collect only your email address and never share it with third parties.