Compare AI tools

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