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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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HeyGen
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MagicSchool
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TaglineRun any open-source AI model with an API call.Spreadsheets with AI + live integrations baked in.AI avatar videos. Record once, speak any language.AI platform built for teachers. Lesson plans + IEPs + admin.
CategoryDev PlatformDataVideoEducation
PricingPay per second of computeFree + $19-$89/user/moFree + $24-$65/moFree + $100/yr Plus + school plans
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Ops teams, marketers, anyone building dashboards from multiple sources.Course creators, multilingual marketers, anyone scaling video content.Teachers prepping materials. School districts.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
  • 60+ teacher-specific tools
  • Generous free tier
  • FERPA + COPPA compliant for schools
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
  • Teacher-only focus
  • Less useful for students
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.S-tier for teachers. If you teach K-12, start here this week.
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