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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
Manus
S
Khanmigo
S
Sora
A
TaglineRun any open-source AI model with an API call.Autonomous AI agent that actually finishes tasks.Khan Academy's AI tutor. Socratic method, built for learning.OpenAI's video model. Long clips, cinematic quality.
CategoryDev PlatformAgentsEducationVideo
PricingPay per second of computeFree tier + $39-$199/mo$4/mo (free for teachers)Included with ChatGPT Plus/Pro
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).People who want to hand off tasks entirely — trip planning, research, spreadsheet building.Students K-12. Parents helping with homework. Teachers prepping lessons.ChatGPT subscribers experimenting with cinematic shots.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • General-purpose agent — research, book, build, analyze
  • Parallel task execution
  • Web browsing + file creation + coding
  • 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
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Still hit-or-miss on complex multi-hour tasks
  • Can burn credits fast
  • 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
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier in the agent category. The first one I'd give to a non-technical friend.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.
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