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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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S
Khanmigo
S
Sora
A
Manus
S
TaglineRun any open-source AI model with an API call.Khan Academy's AI tutor. Socratic method, built for learning.OpenAI's video model. Long clips, cinematic quality.Autonomous AI agent that actually finishes tasks.
CategoryDev PlatformEducationVideoAgents
PricingPay per second of compute$4/mo (free for teachers)Included with ChatGPT Plus/ProFree tier + $39-$199/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Students K-12. Parents helping with homework. Teachers prepping lessons.ChatGPT subscribers experimenting with cinematic shots.People who want to hand off tasks entirely — trip planning, research, spreadsheet building.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Socratic — doesn't give answers, asks questions
  • Trusted by schools + parents
  • Integrated with Khan Academy curriculum
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • K-12 focus (not deep for adults)
  • Slower than general chatbots
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for kids learning. The tutoring UX is legit — not a generic chatbot dressed up.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.S-tier in the agent category. The first one I'd give to a non-technical friend.
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