Write smarter with AI
403 AI is a free writing platform where anyone can create, publish, and discover AI-assisted articles.
How it works
Write
Open the editor and start writing. Use our rich text editor with full formatting, images, and code blocks.
AI Assist
Generate article outlines and full drafts with AI. Bring your own API key for Claude or GPT — it's free.
Publish
Hit publish and your article goes live. Share it with the world, get readers, build your audience.
Everything you need to write and publish
Rich Text Editor
Write with a full-featured editor. Headings, images, code blocks, lists — everything you need.
AI Article Generation
Generate outlines and complete articles using Claude or GPT-4. Review before publishing.
Bring Your Own Key
Use your own API keys for free AI generation. Keys are encrypted and never stored in plain text.
Pro Plan
Upgrade for platform-provided AI keys, ad-free posts, and analytics for your articles.