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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
DeepSeek
S
Pika
A
TaglineRun any open-source AI model with an API call.One API, every model. Pay-as-you-go, no subscriptions.Chinese open-weight powerhouse. Crazy cheap, genuinely smart.The playful, accessible AI video tool.
CategoryDev PlatformDev PlatformChatbotsVideo
PricingPay per second of computePay per token — model-dependentFree web + ultra-cheap API (~$0.14/M input tokens)Free + $8-$58/mo
Best forDevelopers using open-source models (Flux, SDXL, Whisper, etc).Developers experimenting across models. Apps that want fallback logic.Developers + cost-conscious builders. Anyone fine with self-hosting.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
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • 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
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • 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 price/performance. A-tier for consumer use. If you build apps, this is the budget pick.A-tier for social/casual. B-tier for serious work. Good entry point.
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