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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Windsurf
A
Cline
A
OpenRouter
S
Rows
A
TaglineCodeium's agentic IDE. Cascade agent + strong free tier.Open-source VS Code agent. Reads + writes + runs.One API, every model. Pay-as-you-go, no subscriptions.Spreadsheets with AI + live integrations baked in.
CategoryCodingCodingDev PlatformData
PricingFree + $15/mo ProFree (open source) + your API costsPay per token — model-dependentFree + $19-$89/user/mo
Best forDevelopers who want Cursor-like power for less money.VS Code users who want agentic coding without changing IDEs.Developers experimenting across models. Apps that want fallback logic.Ops teams, marketers, anyone building dashboards from multiple sources.
Strengths
  • Cheaper than Cursor
  • Cascade agent for multi-file tasks
  • Solid free tier
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • 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
Weaknesses
  • Smaller community
  • Model selection more limited
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Slight markup over direct API
  • Some provider features not exposed
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
Kai's verdictA-tier. Close second to Cursor. If $5/mo matters, start here.A-tier. Best free agentic option in VS Code. Use with Claude for best results.S-tier for model-shopping. I use this for every prototype before committing.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.
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