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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
OpenRouter
S
Recraft
S
Pika
A
TaglineRun any open-source AI model with an API call.One API, every model. Pay-as-you-go, no subscriptions.Vector + raster AI for designers. Actually controls the output.The playful, accessible AI video tool.
CategoryDev PlatformDev PlatformImageVideo
PricingPay per second of computePay per token — model-dependentFree + $12-$48/moFree + $8-$58/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers experimenting across models. Apps that want fallback logic.Designers, brand teams, anyone needing vector output or tight style control.Social media creators, beginners, anyone wanting quick fun clips.
Strengths
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Exports SVG vectors — rare in AI image gen
  • Strong style control + consistency
  • Brand kit for consistent outputs
  • Ingredients feature — combine people, objects, scenes
  • Lip sync + sound effects
  • Fun, approachable UX
Weaknesses
  • Cold starts on less-popular models
  • Pricing gets real at scale
  • Slight markup over direct API
  • Some provider features not exposed
  • Less hyped than Midjourney
  • Learning curve for non-designers
  • Lower fidelity than Runway/Kling
  • Still rough on complex scenes
Kai's verdictS-tier for open-source model APIs. The default in this space.S-tier for model-shopping. I use this for every prototype before committing.S-tier for designers. The only one that takes vectors seriously.A-tier for social/casual. B-tier for serious work. Good entry point.
LinkOpen →Open →Open →Open →