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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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GitHub Copilot
B
OpenRouter
S
Rows
A
Julius
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.One API, every model. Pay-as-you-go, no subscriptions.Spreadsheets with AI + live integrations baked in.Chat with your data. Upload a CSV, ask questions, get charts.
Categorycodingdev platformdatadata
PricingFree (limited) + $10/mo Pro + $19/mo BusinessPay per token — model-dependentFree + $19-$89/user/moFree + $20-$65/mo
Best forTeams with GitHub already. Devs who don't want to change IDEs.Developers experimenting across models. Apps that want fallback logic.Ops teams, marketers, anyone building dashboards from multiple sources.Analysts, founders, anyone with a spreadsheet + a question.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • 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
  • Handles complex CSVs + spreadsheets
  • Generates real Python analysis + charts
  • No technical setup
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Slight markup over direct API
  • Some provider features not exposed
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • File size limits
  • Can hallucinate on messy data
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.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.S-tier for ad-hoc analysis. Makes you feel like a data scientist in 30 seconds.
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