Compare AI tools

	GitHub Copilot B	Claude Code S	OpenRouter S	Aider A
Tagline	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	Anthropic's CLI agent. Opus-powered, operates on your repo directly.	One API, every model. Pay-as-you-go, no subscriptions.	Terminal-based AI pair programmer. Git-aware, model-flexible.
Category	coding	coding	dev platform	coding
Pricing	Free (limited) + $10/mo Pro + $19/mo Business	Part of Claude Pro/Max/Team plans	Pay per token — model-dependent	Free (open source) + whatever API you use
Best for	Teams with GitHub already. Devs who don't want to change IDEs.	Developers who want an agent, not autocomplete. Large refactors, tests, docs.	Developers experimenting across models. Apps that want fallback logic.	Developers who want open-source tooling with full control.
Strengths	Great enterprise story Works in your existing IDE Chat + autocomplete	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	Works in any terminal Auto-commits changes with meaningful messages Works with any model (Claude, GPT, local) Minimal learning curve
Weaknesses	Less agentic than Cursor/Claude Code Model quality varies	Terminal-based — learning curve Can't be used without Claude subscription	Slight markup over direct API Some provider features not exposed	Terminal-only Less agentic than Claude Code Setup on Windows is fiddly
Kai's verdict	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	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.	A-tier. The right answer if you want open-source + terminal-native + model-agnostic.
Link	Open →	Open →	Open →	Open →