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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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Dev Platform
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S
Aider
A
MagicSchool
S
Gamma
A
TaglineRun any open-source AI model with an API call.Terminal-based AI pair programmer. Git-aware, model-flexible.AI platform built for teachers. Lesson plans + IEPs + admin.AI slide decks that don't look AI-generated.
CategoryDev PlatformCodingEducationProductivity
PricingPay per second of computeFree (open source) + whatever API you useFree + $100/yr Plus + school plansFree + $10-$20/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers who want open-source tooling with full control.Teachers prepping materials. School districts.Pitch decks, proposals, internal presentations — fast.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • 60+ teacher-specific tools
  • Generous free tier
  • FERPA + COPPA compliant for schools
  • Strong templates
  • Decks, docs, webpages
  • Doesn't look generic
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Teacher-only focus
  • Less useful for students
  • Locked into Gamma's format
  • Export quality varies
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.S-tier for teachers. If you teach K-12, start here this week.A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.
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