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Perplexity
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DeepSeek
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Replicate
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TaglineAI search done right. Cited answers, not chat theater.Chinese open-weight powerhouse. Crazy cheap, genuinely smart.Run any open-source AI model with an API call.
Categoryresearchchatdev platform
PricingFree + $20/mo ProFree web + ultra-cheap API (~$0.14/M input tokens)Pay per second of compute
Best forReplacing Google for any question where you want a cited answer in seconds.Developers + cost-conscious builders. Anyone fine with self-hosting.Developers using open-source models (Flux, SDXL, Whisper, etc).
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Tens of thousands of models (image, video, audio, LLMs)
  • One-line API for any model
  • Cog framework for custom model deploy
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Cold starts on less-popular models
  • Pricing gets real at scale
Kai's verdictS-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.S-tier for open-source model APIs. The default in this space.
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