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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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Claude
S
Perplexity
S
Groq
S
Cursor
S
TaglineAnthropic's flagship — best reasoning + longest useful context.AI search done right. Cited answers, not chat theater.The fastest AI inference in the world. Crazy low latency.VS Code fork that made AI coding actually work.
CategoryChatbotsResearchDev PlatformCoding
PricingFree + $20/mo Pro + team/enterpriseFree + $20/mo ProFree tier + pay-as-you-go APIFree + $20/mo Pro + $40/mo Business
Best forLong writing, code, careful thinking, documents over 50 pages.Replacing Google for any question where you want a cited answer in seconds.Developers who need sub-100ms LLM responses.Developers. Non-developers who want to ship working code.
Strengths
  • Best-in-class writing + nuanced reasoning
  • 1M context on Opus
  • Artifacts for code/docs
  • Lowest hallucination rate in my testing
  • 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
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
Weaknesses
  • Image generation is weak
  • No native web search on all tiers
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Can feel overwhelming for non-coders
  • Expensive at scale
Kai's verdictS-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.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.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.
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