Compare AI tools

	GitHub Copilot B	Claude Code S	OpenRouter S	Duolingo Max 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.	Duolingo + AI. Explain My Answer + Roleplay features.
Category	coding	coding	dev platform	education
Pricing	Free (limited) + $10/mo Pro + $19/mo Business	Part of Claude Pro/Max/Team plans	Pay per token — model-dependent	$30/mo (or ~$168/yr)
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.	Language learners who've outgrown basic Duolingo.
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	Explain My Answer = personal tutor for every mistake Roleplay = real conversation practice Gamification that actually sticks
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	Pricey vs free Duolingo Conversation AI still stiff sometimes
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. If you already love Duolingo, worth it. If starting fresh, try ChatGPT Voice instead.
Link	Open →	Open →	Open →	Open →