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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
Gemini
A
Grammarly
A
Cursor
S
TaglineMicrosoft/GitHub's autocomplete. Deep VS Code + JetBrains integration.Google's answer. Best integrated with Workspace + free for a lot.Grammar check + tone + AI drafting, everywhere you type.VS Code fork that made AI coding actually work.
Categorycodingchatwritingcoding
PricingFree (limited) + $10/mo Pro + $19/mo BusinessFree + $20/mo Advanced (bundled with 2TB Drive)Free + $12-$15/mo Premium + team plansFree + $20/mo Pro + $40/mo Business
Best forTeams with GitHub already. Devs who don't want to change IDEs.Anyone already on Google, research tasks, summarizing long documents.Non-native English writers, business email, anyone who types a lot.Developers. Non-developers who want to ship working code.
Strengths
  • Great enterprise story
  • Works in your existing IDE
  • Chat + autocomplete
  • Native Google Workspace integration
  • Very long context (1M+)
  • Deep Research feature
  • Free tier is generous
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Tab completion feels like mind-reading
  • Composer for multi-file edits
  • Runs Claude, GPT, Gemini — you pick
Weaknesses
  • Less agentic than Cursor/Claude Code
  • Model quality varies
  • Writing quality trails Claude
  • Over-refusals on edge content
  • UI is cluttered
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Can feel overwhelming for non-coders
  • Expensive at scale
Kai's verdictB-tier. Solid for autocomplete but the category moved past it. Pick Cursor unless you can't.A-tier. The Deep Research feature is genuinely useful. Don't sleep on it if you're already paying Google.A-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.S-tier for coding. If you write code of any kind, this pays back the $20 in a day.
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