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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
Gemini
A
Lovable
A
Synthesia
A
TaglineRun any open-source AI model with an API call.Google's answer. Best integrated with Workspace + free for a lot.Build a full app from a prompt. Stripe-ready.Enterprise AI avatar video for training + comms.
CategoryDev PlatformChatbotsDesignVideo
PricingPay per second of computeFree + $20/mo Advanced (bundled with 2TB Drive)Free + $25-$100/mo$22-$89/mo + enterprise
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Anyone already on Google, research tasks, summarizing long documents.Non-devs + solopreneurs shipping MVPs.Enterprise L&D, corporate training, internal comms.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • Generates full apps + DB + auth
  • Good for non-developers
  • Ships faster than hand-coding
  • Polished, corporate-safe avatars
  • 140+ languages
  • Enterprise compliance + SSO
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Complexity ceiling
  • Can generate brittle code
  • More expensive than HeyGen for individuals
  • Less viral-friendly output
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.A-tier. The strongest 'no-code' AI builder right now. Great for founder MVPs.A-tier. HeyGen wins for creators, Synthesia wins for enterprise.
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