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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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Lex
A
Perplexity
S
ChatGPT Operator
B
Cursor
S
TaglineGoogle Docs with an AI collaborator baked in.AI search done right. Cited answers, not chat theater.OpenAI's browser agent. Clicks and types on websites for you.VS Code fork that made AI coding actually work.
Categorywritingresearchagentscoding
PricingFree + $12/moFree + $20/mo ProIncluded with ChatGPT Pro $200/moFree + $20/mo Pro + $40/mo Business
Best forEssays, long-form drafts, thinking on the page.Replacing Google for any question where you want a cited answer in seconds.Power users willing to pay $200/mo for a browser bot.Developers. Non-developers who want to ship working code.
Strengths
  • 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
  • Actually uses websites — fills forms, clicks, checks out
  • Built into ChatGPT
  • Good for repetitive web tasks
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Slow vs doing it yourself
  • Breaks on complex auth flows
  • $200/mo gate
  • Can feel overwhelming for non-coders
  • Expensive at scale
Kai's verdictA-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.B-tier. Still early. Manus is more flexible for less money.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.
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