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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
Hume AI
A
Claude Code
S
Manus
S
TaglineDuolingo + AI. Explain My Answer + Roleplay features.Voice AI that reads + expresses emotion.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Autonomous AI agent that actually finishes tasks.
CategoryEducationVoiceCodingAgents
Pricing$30/mo (or ~$168/yr)Free tier + pay-as-you-goPart of Claude Pro/Max/Team plansFree tier + $39-$199/mo
Best forLanguage learners who've outgrown basic Duolingo.Therapy apps, customer service, any voice agent where emotion matters.Developers who want an agent, not autocomplete. Large refactors, tests, docs.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.
Strengths
  • Explain My Answer = personal tutor for every mistake
  • Roleplay = real conversation practice
  • Gamification that actually sticks
  • Detects + mirrors emotional tone
  • EVI (Empathic Voice Interface) feels different
  • Expressive voice output
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
Weaknesses
  • Pricey vs free Duolingo
  • Conversation AI still stiff sometimes
  • Niche use case
  • Pricing ramps fast
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
Kai's verdictA-tier. If you already love Duolingo, worth it. If starting fresh, try ChatGPT Voice instead.A-tier in its niche. The only one that actually gets emotion right.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.S-tier in the agent category. The first one I'd give to a non-technical friend.
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