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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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Aider
A
Rows
A
GitHub Copilot
B
Le Chat (Mistral)
B
TaglineTerminal-based AI pair programmer. Git-aware, model-flexible.Spreadsheets with AI + live integrations baked in.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.French alternative. Fast, European, privacy-focused.
Categorycodingdatacodingchat
PricingFree (open source) + whatever API you useFree + $19-$89/user/moFree (limited) + $10/mo Pro + $19/mo BusinessFree + $15/mo Pro
Best forDevelopers who want open-source tooling with full control.Ops teams, marketers, anyone building dashboards from multiple sources.Teams with GitHub already. Devs who don't want to change IDEs.European users with data residency needs. Fans of open-weight models.
Strengths
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
  • Pull live data from Stripe, Slack, Google Analytics, etc.
  • AI functions inside cells
  • Modern UX
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • European data residency
  • Very fast responses
  • Open-weight Mistral models available
  • Good French/European languages
Weaknesses
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
  • Not a full Excel replacement for heavy users
  • Integrations best on paid tiers
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Smaller capability gap vs frontier models
  • Less polished UX
Kai's verdictA-tier. The right answer if you want open-source + terminal-native + model-agnostic.A-tier. The most interesting spreadsheet in years. Great for ops dashboards.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.B-tier overall, A-tier if GDPR/data residency matters. Solid backup option.
LinkOpen →Open →Open →Open →