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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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Cursor
S
Cline
A
GitHub Copilot
B
Grammarly
A
TaglineVS Code fork that made AI coding actually work.Open-source VS Code agent. Reads + writes + runs.Microsoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Grammar check + tone + AI drafting, everywhere you type.
Categorycodingcodingcodingwriting
PricingFree + $20/mo Pro + $40/mo BusinessFree (open source) + your API costsFree (limited) + $10/mo Pro + $19/mo BusinessFree + $12-$15/mo Premium + team plans
Best forDevelopers. Non-developers who want to ship working code.VS Code users who want agentic coding without changing IDEs.Teams with GitHub already. Devs who don't want to change IDEs.Non-native English writers, business email, anyone who types a lot.
Strengths
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
  • Free extension for VS Code
  • Plan + Act modes
  • Model-agnostic (Claude, GPT, local)
  • Sees terminal output and iterates
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
Weaknesses
  • Can feel overwhelming for non-coders
  • Expensive at scale
  • Can burn tokens fast if not watched
  • Less polished than Cursor
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
Kai's verdictS-tier for coding. If you write code of any kind, this pays back the $20 in a day.A-tier. Best free agentic option in VS Code. Use with Claude for best results.B-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.
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