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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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Perplexity
S
NotebookLM
S
Kling
A
Rows
A
TaglineAI search done right. Cited answers, not chat theater.Google's research notebook. Turns your docs into a podcast.Kuaishou's video model. The surprise standout.Spreadsheets with AI + live integrations baked in.
CategoryResearchResearchVideoData
PricingFree + $20/mo ProFreeCredit-based, free trialFree + $19-$89/user/mo
Best forReplacing Google for any question where you want a cited answer in seconds.Students, researchers, anyone with a stack of PDFs or a topic to learn.Anyone who wants top-tier video quality for less.Ops teams, marketers, anyone building dashboards from multiple sources.
Strengths
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Upload anything, ask questions, get cited answers
  • Audio Overview turns docs into a 10-min podcast
  • Great for studying
  • Very strong motion + physics
  • Often beats Runway on realism
  • Great price
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Google-only
  • Can be slow on large corpora
  • UX is rough for English speakers
  • Queue times
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
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 study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.A-tier. Rising fast. If you can tolerate the UX, quality per dollar is best-in-class.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.
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