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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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OpenRouter
S
Rows
A
Lex
A
TaglineOne API, every model. Pay-as-you-go, no subscriptions.Spreadsheets with AI + live integrations baked in.Google Docs with an AI collaborator baked in.
CategoryDev PlatformDataWriting
PricingPay per token — model-dependentFree + $19-$89/user/moFree + $12/mo
Best forDevelopers experimenting across models. Apps that want fallback logic.Ops teams, marketers, anyone building dashboards from multiple sources.Essays, long-form drafts, thinking on the page.
Strengths
  • 300+ models from one endpoint
  • Automatic fallbacks between providers
  • No subscription — just pay what you use
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Clean writing UX — distraction-free
  • +++ prompt triggers AI help
  • Collaboration + AI feedback together
Weaknesses
  • Slight markup over direct API
  • Some provider features not exposed
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Less feature-rich than Google Docs
  • AI ceiling below dedicated tools
Kai's verdictS-tier for model-shopping. I use this for every prototype before committing.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.A-tier. Beautiful UX. The writing app I'd pick if I only wrote long-form.
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