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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
Bolt.new (StackBlitz)
A
Gamma
A
TaglineRun any open-source AI model with an API call.Prompt to deployed full-stack app in the browser.AI slide decks that don't look AI-generated.
CategoryDev PlatformCodingProductivity
PricingPay per second of computeFree + $20-$200/moFree + $10-$20/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).PMs, founders, non-devs shipping MVPs.Pitch decks, proposals, internal presentations — fast.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Full-stack generation + live preview
  • Deploy to Netlify in one click
  • Works in-browser — no install
  • Strong templates
  • Decks, docs, webpages
  • Doesn't look generic
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
  • Locked into Gamma's format
  • Export quality varies
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. Best for fast prototypes. Competitive with Lovable — try both.A-tier. Best of a boring category. Use it for first drafts, then edit in Keynote if high-stakes.
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