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TaglineAI search done right. Cited answers, not chat theater.VS Code fork that made AI coding actually work.Google Docs with an AI collaborator baked in.AI research assistant for academic literature.
CategoryResearchCodingWritingResearch
PricingFree + $20/mo ProFree + $20/mo Pro + $40/mo BusinessFree + $12/moFree + $12-$42/mo
Best forReplacing Google for any question where you want a cited answer in seconds.Developers. Non-developers who want to ship working code.Essays, long-form drafts, thinking on the page.Grad students, researchers, anyone doing literature reviews.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Searches 125M+ papers
  • Extracts + synthesizes findings across papers
  • Systematic review workflow
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Academic-only
  • Can hallucinate citations — verify everything
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 coding. If you write code of any kind, this pays back the $20 in a day.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for academic research. Nothing else comes close for systematic reviews.
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