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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
OpenRouter
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.One API, every model. Pay-as-you-go, no subscriptions.
CategoryWritingImageCodingDev Platform
PricingFree + $12/moFree + $12-$60/moPart of Claude Pro/Max/Team plansPay per token — model-dependent
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.Developers experimenting across models. Apps that want fallback logic.
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
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
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
  • Slight markup over direct API
  • Some provider features not exposed
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 for model-shopping. I use this for every prototype before committing.
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