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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
Sora
A
TaglineRun any open-source AI model with an API call.Smooth, cinematic motion. Image-to-video specialist.OpenAI's video model. Long clips, cinematic quality.
Categorydev platformvideovideo
PricingPay per second of computeFree + $10-$500/moIncluded with ChatGPT Plus/Pro
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Photographers animating stills, cinematic b-roll.ChatGPT subscribers experimenting with cinematic shots.
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
  • Up to 20-sec clips at 1080p
  • Strong physics + scene composition
  • Storyboard feature for longer narratives
  • Remix existing videos
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Prompt fidelity below Runway
  • Queue times on free tier
  • Stricter content policy than competitors
  • Hit-or-miss on complex motion
  • Text-in-video still struggles
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. Amazing when it works, frustrating when it doesn't. Runway still more reliable for pros.
LinkOpen →Open →Open →