Compare AI tools

	GitHub Copilot B	Sudowrite S	Aider A	Devin A
Tagline	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	AI writing tool built specifically for fiction writers.	Terminal-based AI pair programmer. Git-aware, model-flexible.	Cognition Labs' autonomous coding engineer.
Category	coding	writing	coding	agents
Pricing	Free (limited) + $10/mo Pro + $19/mo Business	$19-$59/mo	Free (open source) + whatever API you use	$500/mo
Best for	Teams with GitHub already. Devs who don't want to change IDEs.	Novelists, screenwriters, fiction short-form writers.	Developers who want open-source tooling with full control.	Engineering teams offloading tickets. Ops/platform work.
Strengths	Great enterprise story Works in your existing IDE Chat + autocomplete	Brainstorm, expand, rewrite modes designed for fiction Story Bible for character + plot tracking Understands voice + tone better than generic chatbots	Works in any terminal Auto-commits changes with meaningful messages Works with any model (Claude, GPT, local) Minimal learning curve	Works like an engineer — takes Slack tasks, opens PRs Handles multi-hour engineering work Reports back with what it did
Weaknesses	Less agentic than Cursor/Claude Code Model quality varies	Pricey for casual use Fiction-only focus — not for business writing	Terminal-only Less agentic than Claude Code Setup on Windows is fiddly	Expensive Best for well-scoped tasks Not for solo hobbyists
Kai's verdict	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	S-tier for fiction. If you're writing a novel, this beats raw ChatGPT every time.	A-tier. The right answer if you want open-source + terminal-native + model-agnostic.	A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.
Link	Open →	Open →	Open →	Open →