Compare AI tools

	Sudowrite S	Lex A	GitHub Copilot B	Aider A
Tagline	AI writing tool built specifically for fiction writers.	Google Docs with an AI collaborator baked in.	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Terminal-based AI pair programmer. Git-aware, model-flexible.
Category	writing	writing	coding	coding
Pricing	$19-$59/mo	Free + $12/mo	Free (limited) + $10/mo Pro + $19/mo Business	Free (open source) + whatever API you use
Best for	Novelists, screenwriters, fiction short-form writers.	Essays, long-form drafts, thinking on the page.	Teams with GitHub already. Devs who don't want to change IDEs.	Developers who want open-source tooling with full control.
Strengths	Brainstorm, expand, rewrite modes designed for fiction Story Bible for character + plot tracking Understands voice + tone better than generic chatbots	Clean writing UX — distraction-free +++ prompt triggers AI help Collaboration + AI feedback together	Great enterprise story Works in your existing IDE Chat + autocomplete	Works in any terminal Auto-commits changes with meaningful messages Works with any model (Claude, GPT, local) Minimal learning curve
Weaknesses	Pricey for casual use Fiction-only focus — not for business writing	Less feature-rich than Google Docs AI ceiling below dedicated tools	Less agentic than Cursor/Claude Code Model quality varies	Terminal-only Less agentic than Claude Code Setup on Windows is fiddly
Kai's verdict	S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.	A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	A-tier. The right answer if you want open-source + terminal-native + model-agnostic.
Link	Open →	Open →	Open →	Open →