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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
Runway
S
Sora
A
Lovable
A
TaglineRun any open-source AI model with an API call.The pro's AI video tool. Gen-4 is the current bar.OpenAI's video model. Long clips, cinematic quality.Build a full app from a prompt. Stripe-ready.
CategoryDev PlatformVideoVideoDesign
PricingPay per second of computeFree + $15-$95/moIncluded with ChatGPT Plus/ProFree + $25-$100/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Marketing video, pitch decks, b-roll, creative shorts.ChatGPT subscribers experimenting with cinematic shots.Non-devs + solopreneurs shipping MVPs.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Most mature video workflow
  • Character consistency via Act-One
  • Gen-4 quality is production-grade
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
  • Generates full apps + DB + auth
  • Good for non-developers
  • Ships faster than hand-coding
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Expensive at scale
  • Still needs post-editing
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
  • Complexity ceiling
  • Can generate brittle code
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier. Market leader with reason. Start here for serious video.A-tier. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.A-tier. The strongest 'no-code' AI builder right now. Great for founder MVPs.
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