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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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Cursor
S
Groq
S
Lex
A
NotebookLM
S
TaglineVS Code fork that made AI coding actually work.The fastest AI inference in the world. Crazy low latency.Google Docs with an AI collaborator baked in.Google's research notebook. Turns your docs into a podcast.
CategoryCodingDev PlatformWritingResearch
PricingFree + $20/mo Pro + $40/mo BusinessFree tier + pay-as-you-go APIFree + $12/moFree
Best forDevelopers. Non-developers who want to ship working code.Developers who need sub-100ms LLM responses.Essays, long-form drafts, thinking on the page.Students, researchers, anyone with a stack of PDFs or a topic to learn.
Strengths
  • 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
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Upload anything, ask questions, get cited answers
  • Audio Overview turns docs into a 10-min podcast
  • Great for studying
Weaknesses
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Google-only
  • Can be slow on large corpora
Kai's verdictS-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.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for study. The Audio Overview is a killer feature. Try it with three of your favorite PDFs.
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