Compare AI tools

	GitHub Copilot B	Aider A	OpenRouter S	Claude Code S
Tagline	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Terminal-based AI pair programmer. Git-aware, model-flexible.	One API, every model. Pay-as-you-go, no subscriptions.	Anthropic's CLI agent. Opus-powered, operates on your repo directly.
Category	coding	coding	dev platform	coding
Pricing	Free (limited) + $10/mo Pro + $19/mo Business	Free (open source) + whatever API you use	Pay per token — model-dependent	Part of Claude Pro/Max/Team plans
Best for	Teams with GitHub already. Devs who don't want to change IDEs.	Developers who want open-source tooling with full control.	Developers experimenting across models. Apps that want fallback logic.	Developers who want an agent, not autocomplete. Large refactors, tests, docs.
Strengths	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	300+ models from one endpoint Automatic fallbacks between providers No subscription — just pay what you use	Runs locally, edits your actual files Strong on large codebases with 1M context Great at multi-step tasks
Weaknesses	Less agentic than Cursor/Claude Code Model quality varies	Terminal-only Less agentic than Claude Code Setup on Windows is fiddly	Slight markup over direct API Some provider features not exposed	Terminal-based — learning curve Can't be used without Claude subscription
Kai's verdict	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.	S-tier for model-shopping. I use this for every prototype before committing.	S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.
Link	Open →	Open →	Open →	Open →