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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
HeyGen
S
Lovable
A
TaglineRun any open-source AI model with an API call.Google Docs with an AI collaborator baked in.AI avatar videos. Record once, speak any language.Build a full app from a prompt. Stripe-ready.
Categorydev platformwritingvideodesign
PricingPay per second of computeFree + $12/moFree + $24-$65/moFree + $25-$100/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Essays, long-form drafts, thinking on the page.Course creators, multilingual marketers, anyone scaling video content.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
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Clone your face + voice in 2 minutes
  • Instant translation into 40+ languages with lip sync
  • Avatars look less uncanny than competitors
  • 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
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Pricey for serious volume
  • Long shots still feel off
  • Ethics — easy to misuse
  • Complexity ceiling
  • Can generate brittle code
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.S-tier for multilingual video. If you sell courses or speak at events, this is a cheat code.A-tier. The strongest 'no-code' AI builder right now. Great for founder MVPs.
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