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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
Leonardo.ai
A
Claude Code
S
v0
S
TaglineGoogle Docs with an AI collaborator baked in.Gamer + creator image gen with model fine-tuning built in.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Vercel's AI-powered UI generator. Prompt to shadcn component.
CategoryWritingImageCodingDesign
PricingFree + $12/moFree + $12-$60/moPart of Claude Pro/Max/Team plansFree + $20/mo
Best forEssays, long-form drafts, thinking on the page.Indie game devs, illustrators, anyone training custom style models.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Frontend devs, PMs prototyping UIs, anyone on Next.js.
Strengths
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Train your own models on your style/character
  • Great for game art + concept art
  • Generous free tier
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Ships working React + Tailwind code
  • Shadcn/ui native
  • One-click deploy to Vercel
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • General output behind Midjourney
  • Can be overwhelming
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Best for shadcn stack
  • Iterating can be fiddly
Kai's verdictA-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.A-tier for creators training custom looks. B-tier for general use.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.S-tier. If you're on Vercel/shadcn, this is cheating.
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