Compare AI tools

	GitHub Copilot B	OpenRouter S	Claude S	Aider A
Tagline	Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.	One API, every model. Pay-as-you-go, no subscriptions.	Anthropic's flagship — best reasoning + longest useful context.	Terminal-based AI pair programmer. Git-aware, model-flexible.
Category	coding	dev platform	chat	coding
Pricing	Free (limited) + $10/mo Pro + $19/mo Business	Pay per token — model-dependent	Free + $20/mo Pro + team/enterprise	Free (open source) + whatever API you use
Best for	Teams with GitHub already. Devs who don't want to change IDEs.	Developers experimenting across models. Apps that want fallback logic.	Long writing, code, careful thinking, documents over 50 pages.	Developers who want open-source tooling with full control.
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	Best-in-class writing + nuanced reasoning 1M context on Opus Artifacts for code/docs Lowest hallucination rate in my testing	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	Slight markup over direct API Some provider features not exposed	Image generation is weak No native web search on all tiers	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 for model-shopping. I use this for every prototype before committing.	S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.	A-tier. The right answer if you want open-source + terminal-native + model-agnostic.
Link	Open →	Open →	Open →	Open →