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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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Replicate
S
Lex
A
Lovable
A
Kling
A
TaglineRun any open-source AI model with an API call.Google Docs with an AI collaborator baked in.Build a full app from a prompt. Stripe-ready.Kuaishou's video model. The surprise standout.
CategoryDev PlatformWritingDesignVideo
PricingPay per second of computeFree + $12/moFree + $25-$100/moCredit-based, free trial
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Essays, long-form drafts, thinking on the page.Non-devs + solopreneurs shipping MVPs.Anyone who wants top-tier video quality for less.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Generates full apps + DB + auth
  • Good for non-developers
  • Ships faster than hand-coding
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Complexity ceiling
  • Can generate brittle code
  • UX is rough for English speakers
  • Queue times
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.A-tier. The strongest 'no-code' AI builder right now. Great for founder MVPs.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.
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