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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
Luma Dream Machine
A
Bolt.new (StackBlitz)
A
TaglineRun any open-source AI model with an API call.Smooth, cinematic motion. Image-to-video specialist.Prompt to deployed full-stack app in the browser.
CategoryDev PlatformVideoCoding
PricingPay per second of computeFree + $10-$500/moFree + $20-$200/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Photographers animating stills, cinematic b-roll.PMs, founders, non-devs shipping MVPs.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • Best image-to-video in the category
  • Great camera motion control
  • Ray 2 model produces striking shots
  • Full-stack generation + live preview
  • Deploy to Netlify in one click
  • Works in-browser — no install
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Prompt fidelity below Runway
  • Queue times on free tier
  • Quality ceiling for complex apps
  • Can get into loops for non-trivial bugs
Kai's verdictS-tier for open-source model APIs. The default in this space.A-tier. Best for cinematic image-to-video. Pair with Runway for coverage.A-tier. Best for fast prototypes. Competitive with Lovable — try both.
LinkOpen →Open →Open →