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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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NotebookLM
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TaglineAI search done right. Cited answers, not chat theater.VS Code fork that made AI coding actually work.The fastest AI inference in the world. Crazy low latency.Google's research notebook. Turns your docs into a podcast.
CategoryResearchCodingDev PlatformResearch
PricingFree + $20/mo ProFree + $20/mo Pro + $40/mo BusinessFree tier + pay-as-you-go APIFree
Best forReplacing Google for any question where you want a cited answer in seconds.Developers. Non-developers who want to ship working code.Developers who need sub-100ms LLM responses.Students, researchers, anyone with a stack of PDFs or a topic to learn.
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
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Upload anything, ask questions, get cited answers
  • Audio Overview turns docs into a 10-min podcast
  • Great for studying
Weaknesses
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Google-only
  • Can be slow on large corpora
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.S-tier for speed. When latency is the product, start here.S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.
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