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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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Dev Platform
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Lex
A
v0
S
Leonardo.ai
A
Claude Code
S
TaglineGoogle Docs with an AI collaborator baked in.Vercel's AI-powered UI generator. Prompt to shadcn component.Gamer + creator image gen with model fine-tuning built in.Anthropic's CLI agent. Opus-powered, operates on your repo directly.
CategoryWritingDesignImageCoding
PricingFree + $12/moFree + $20/moFree + $12-$60/moPart of Claude Pro/Max/Team plans
Best forEssays, long-form drafts, thinking on the page.Frontend devs, PMs prototyping UIs, anyone on Next.js.Indie game devs, illustrators, anyone training custom style models.Developers who want an agent, not autocomplete. Large refactors, tests, docs.
Strengths
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
  • Ships working React + Tailwind code
  • Shadcn/ui native
  • One-click deploy to Vercel
  • 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
Weaknesses
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
  • Best for shadcn stack
  • Iterating can be fiddly
  • General output behind Midjourney
  • Can be overwhelming
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
Kai's verdictA-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.S-tier. If you're on Vercel/shadcn, this is cheating.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.
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