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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
Perplexity
S
Cline
A
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Cognition Labs' autonomous coding engineer.AI search done right. Cited answers, not chat theater.Open-source VS Code agent. Reads + writes + runs.
Categorycodingagentsresearchcoding
PricingFree (limited) + $10/mo Pro + $19/mo Business$500/moFree + $20/mo ProFree (open source) + your API costs
Best forTeams with GitHub already. Devs who don't want to change IDEs.Engineering teams offloading tickets. Ops/platform work.Replacing Google for any question where you want a cited answer in seconds.VS Code users who want agentic coding without changing IDEs.
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
  • Sources every claim
  • Fast, current answers
  • Pro Search runs multi-step research
  • Spaces for persistent context
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Expensive
  • Best for well-scoped tasks
  • Not for solo hobbyists
  • Not a general chatbot
  • Answers can be shallow on complex topics
  • Can burn tokens fast if not watched
  • Less polished than Cursor
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.S-tier for search. I use it before Google now. If you're still Googling everything, try this for a week.A-tier. Best free agentic option in VS Code. Use with Claude for best results.
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