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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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MagicSchool
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Aider
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TaglineVS Code fork that made AI coding actually work.AI platform built for teachers. Lesson plans + IEPs + admin.Terminal-based AI pair programmer. Git-aware, model-flexible.
Categorycodingeducationcoding
PricingFree + $20/mo Pro + $40/mo BusinessFree + $100/yr Plus + school plansFree (open source) + whatever API you use
Best forDevelopers. Non-developers who want to ship working code.Teachers prepping materials. School districts.Developers who want open-source tooling with full control.
Strengths
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • 60+ teacher-specific tools
  • Generous free tier
  • FERPA + COPPA compliant for schools
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
Weaknesses
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Teacher-only focus
  • Less useful for students
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
Kai's verdictS-tier for coding. If you write code of any kind, this pays back the $20 in a day.S-tier for teachers. If you teach K-12, start here this week.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.
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