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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
Devin
A
Cline
A
Aider
A
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Cognition Labs' autonomous coding engineer.Open-source VS Code agent. Reads + writes + runs.Terminal-based AI pair programmer. Git-aware, model-flexible.
Categorycodingagentscodingcoding
PricingFree (limited) + $10/mo Pro + $19/mo Business$500/moFree (open source) + your API costsFree (open source) + whatever API you use
Best forTeams with GitHub already. Devs who don't want to change IDEs.Engineering teams offloading tickets. Ops/platform work.VS Code users who want agentic coding without changing IDEs.Developers who want open-source tooling with full control.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Works like an engineer — takes Slack tasks, opens PRs
  • Handles multi-hour engineering work
  • Reports back with what it did
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • Works in any terminal
  • Auto-commits changes with meaningful messages
  • Works with any model (Claude, GPT, local)
  • Minimal learning curve
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Terminal-only
  • Less agentic than Claude Code
  • Setup on Windows is fiddly
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier for the right use case. Not for solo devs. If you manage engineers, try one license.A-tier. Best free agentic option in VS Code. Use with Claude for best results.A-tier. The right answer if you want open-source + terminal-native + model-agnostic.
LinkOpen →Open →Open →Open →