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DeepSeek
S
Lex
A
Perplexity
S
Groq
S
TaglineChinese open-weight powerhouse. Crazy cheap, genuinely smart.Google Docs with an AI collaborator baked in.AI search done right. Cited answers, not chat theater.The fastest AI inference in the world. Crazy low latency.
CategoryChatbotsWritingResearchDev Platform
PricingFree web + ultra-cheap API (~$0.14/M input tokens)Free + $12/moFree + $20/mo ProFree tier + pay-as-you-go API
Best forDevelopers + cost-conscious builders. Anyone fine with self-hosting.Essays, long-form drafts, thinking on the page.Replacing Google for any question where you want a cited answer in seconds.Developers who need sub-100ms LLM responses.
Strengths
  • Open weights you can self-host
  • Strong reasoning + math
  • Near-free API pricing
  • DeepSeek-V3 / R1 are serious models
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
Weaknesses
  • Data goes to servers in China — privacy concerns for business use
  • Chinese policy filters
  • English polish trails Western models
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
Kai's verdictS-tier for price/performance. A-tier for consumer use. If you build apps, this is the budget pick.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.S-tier for speed. When latency is the product, start here.
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