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Side-by-side: what they do, what they cost, what Kai actually thinks. Pass up to 4 tools via ?tools=claude,chatgpt,gemini.
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Duolingo Max
A
Claude Code
S
Claude
S
Gemini
A
TaglineDuolingo + AI. Explain My Answer + Roleplay features.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Anthropic's flagship — best reasoning + longest useful context.Google's answer. Best integrated with Workspace + free for a lot.
CategoryEducationCodingChatbotsChatbots
Pricing$30/mo (or ~$168/yr)Part of Claude Pro/Max/Team plansFree + $20/mo Pro + team/enterpriseFree + $20/mo Advanced (bundled with 2TB Drive)
Best forLanguage learners who've outgrown basic Duolingo.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Long writing, code, careful thinking, documents over 50 pages.Anyone already on Google, research tasks, summarizing long documents.
Strengths
  • Explain My Answer = personal tutor for every mistake
  • Roleplay = real conversation practice
  • Gamification that actually sticks
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Best-in-class writing + nuanced reasoning
  • 1M context on Opus
  • Artifacts for code/docs
  • Lowest hallucination rate in my testing
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
Weaknesses
  • Pricey vs free Duolingo
  • Conversation AI still stiff sometimes
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Image generation is weak
  • No native web search on all tiers
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
Kai's verdictA-tier. If you already love Duolingo, worth it. If starting fresh, try ChatGPT Voice instead.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.
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