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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
Ideogram
S
Aider
A
TaglineGoogle Docs with an AI collaborator baked in.AI search done right. Cited answers, not chat theater.The one that actually gets text in images right.Terminal-based AI pair programmer. Git-aware, model-flexible.
Categorywritingresearchimagecoding
PricingFree + $12/moFree + $20/mo ProFree + $8/mo + $20/mo + $60/moFree (open source) + whatever API you use
Best forEssays, long-form drafts, thinking on the page.Replacing Google for any question where you want a cited answer in seconds.Anything with text — posters, ads, album covers, slide decks.Developers who want open-source tooling with full control.
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
  • Best text rendering in the game
  • Strong free tier
  • Good for logos, posters, thumbnails
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Aesthetic ceiling below Midjourney
  • Less style variety
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
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.S-tier for text-in-image. Use this for posters, Midjourney for art.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.
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