KaiAI tutor for anyone

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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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OpenRouter
S
Rows
A
Le Chat (Mistral)
B
Gemini
A
TaglineOne API, every model. Pay-as-you-go, no subscriptions.Spreadsheets with AI + live integrations baked in.French alternative. Fast, European, privacy-focused.Google's answer. Best integrated with Workspace + free for a lot.
CategoryDev PlatformDataChatbotsChatbots
PricingPay per token — model-dependentFree + $19-$89/user/moFree + $15/mo ProFree + $20/mo Advanced (bundled with 2TB Drive)
Best forDevelopers experimenting across models. Apps that want fallback logic.Ops teams, marketers, anyone building dashboards from multiple sources.European users with data residency needs. Fans of open-weight models.Anyone already on Google, research tasks, summarizing long documents.
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
  • European data residency
  • Very fast responses
  • Open-weight Mistral models available
  • Good French/European languages
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
Weaknesses
  • Slight markup over direct API
  • Some provider features not exposed
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Smaller capability gap vs frontier models
  • Less polished UX
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
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.B-tier overall, A-tier if GDPR/data residency matters. Solid backup option.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.
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