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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
ChatGPT
S
Gamma
A
TaglineDuolingo + AI. Explain My Answer + Roleplay features.The default. Strongest ecosystem + best multimodal breadth.AI slide decks that don't look AI-generated.
Categoryeducationchatproductivity
Pricing$30/mo (or ~$168/yr)Free + $20/mo Plus + $200/mo ProFree + $10-$20/mo
Best forLanguage learners who've outgrown basic Duolingo.General use, voice chat, image generation, first-time AI users.Pitch decks, proposals, internal presentations — fast.
Strengths
  • Explain My Answer = personal tutor for every mistake
  • Roleplay = real conversation practice
  • Gamification that actually sticks
  • Great voice mode
  • Huge plugin/custom GPT ecosystem
  • Strong image generation (DALL-E built in)
  • Code Interpreter
  • Strong templates
  • Decks, docs, webpages
  • Doesn't look generic
Weaknesses
  • Pricey vs free Duolingo
  • Conversation AI still stiff sometimes
  • Reasoning quality varies by mode
  • Can be verbose
  • Confabulates on niche facts
  • Locked into Gamma's format
  • Export quality varies
Kai's verdictA-tier. If you already love Duolingo, worth it. If starting fresh, try ChatGPT Voice instead.S-tier all-rounder. If you want one tool that does everything okay-to-great, this is it.A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.
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