Compare AI tools

	GitHub Copilot B	OpenRouter S	Aider A	Claude S
Tagline	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	One API, every model. Pay-as-you-go, no subscriptions.	Terminal-based AI pair programmer. Git-aware, model-flexible.	Anthropic's flagship — best reasoning + longest useful context.
Category	coding	dev platform	coding	chat
Pricing	Free (limited) + $10/mo Pro + $19/mo Business	Pay per token — model-dependent	Free (open source) + whatever API you use	Free + $20/mo Pro + team/enterprise
Best for	Teams with GitHub already. Devs who don't want to change IDEs.	Developers experimenting across models. Apps that want fallback logic.	Developers who want open-source tooling with full control.	Long writing, code, careful thinking, documents over 50 pages.
Strengths	Great enterprise story Works in your existing IDE Chat + autocomplete	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	Best-in-class writing + nuanced reasoning 1M context on Opus Artifacts for code/docs Lowest hallucination rate in my testing
Weaknesses	Less agentic than Cursor/Claude Code Model quality varies	Slight markup over direct API Some provider features not exposed	Terminal-only Less agentic than Claude Code Setup on Windows is fiddly	Image generation is weak No native web search on all tiers
Kai's verdict	B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.	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.	S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.
Link	Open →	Open →	Open →	Open →