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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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Khanmigo
S
Claude
S
GitHub Copilot
B
Duolingo Max
A
TaglineKhan Academy's AI tutor. Socratic method, built for learning.Anthropic's flagship — best reasoning + longest useful context.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Duolingo + AI. Explain My Answer + Roleplay features.
CategoryEducationChatbotsCodingEducation
Pricing$4/mo (free for teachers)Free + $20/mo Pro + team/enterpriseFree (limited) + $10/mo Pro + $19/mo Business$30/mo (or ~$168/yr)
Best forStudents K-12. Parents helping with homework. Teachers prepping lessons.Long writing, code, careful thinking, documents over 50 pages.Teams with GitHub already. Devs who don't want to change IDEs.Language learners who've outgrown basic Duolingo.
Strengths
  • Socratic — doesn't give answers, asks questions
  • Trusted by schools + parents
  • Integrated with Khan Academy curriculum
  • Best-in-class writing + nuanced reasoning
  • 1M context on Opus
  • Artifacts for code/docs
  • Lowest hallucination rate in my testing
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Explain My Answer = personal tutor for every mistake
  • Roleplay = real conversation practice
  • Gamification that actually sticks
Weaknesses
  • K-12 focus (not deep for adults)
  • Slower than general chatbots
  • Image generation is weak
  • No native web search on all tiers
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Pricey vs free Duolingo
  • Conversation AI still stiff sometimes
Kai's verdictS-tier for kids learning. The tutoring UX is legit — not a generic chatbot dressed up.S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. If you already love Duolingo, worth it. If starting fresh, try ChatGPT Voice instead.
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