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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
Groq
S
Cursor
S
Elicit
S
TaglineGoogle Docs with an AI collaborator baked in.The fastest AI inference in the world. Crazy low latency.VS Code fork that made AI coding actually work.AI research assistant for academic literature.
CategoryWritingDev PlatformCodingResearch
PricingFree + $12/moFree tier + pay-as-you-go APIFree + $20/mo Pro + $40/mo BusinessFree + $12-$42/mo
Best forEssays, long-form drafts, thinking on the page.Developers who need sub-100ms LLM responses.Developers. Non-developers who want to ship working code.Grad students, researchers, anyone doing literature reviews.
Strengths
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • 500+ tokens/sec on Llama/Mixtral — feels instant
  • Custom LPU hardware
  • Great free tier
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Searches 125M+ papers
  • Extracts + synthesizes findings across papers
  • Systematic review workflow
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Open-weight models only (no Claude/GPT)
  • Less flexibility on custom configs
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Academic-only
  • Can hallucinate citations — verify everything
Kai's verdictA-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier for speed. When latency is the product, start here.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.S-tier for academic research. Nothing else comes close for systematic reviews.
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