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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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Grammarly
A
Claude Code
S
Claude
S
TaglineGrammar check + tone + AI drafting, everywhere you type.Anthropic's CLI agent. Opus-powered, operates on your repo directly.Anthropic's flagship — best reasoning + longest useful context.
CategoryWritingCodingChatbots
PricingFree + $12-$15/mo Premium + team plansPart of Claude Pro/Max/Team plansFree + $20/mo Pro + team/enterprise
Best forNon-native English writers, business email, anyone who types a lot.Developers who want an agent, not autocomplete. Large refactors, tests, docs.Long writing, code, careful thinking, documents over 50 pages.
Strengths
  • Works in every browser/app
  • Now has generative AI (GrammarlyGO)
  • Tone detection + suggestions
  • Runs locally, edits your actual files
  • Strong on large codebases with 1M context
  • Great at multi-step tasks
  • Best-in-class writing + nuanced reasoning
  • 1M context on Opus
  • Artifacts for code/docs
  • Lowest hallucination rate in my testing
Weaknesses
  • Can feel naggy
  • Premium features gate basics
  • Privacy concerns (reads your writing)
  • Terminal-based — learning curve
  • Can't be used without Claude subscription
  • Image generation is weak
  • No native web search on all tiers
Kai's verdictA-tier for non-native English speakers. B-tier if your English is already strong — Claude does better with tone.S-tier if you live in the terminal. Different shape than Cursor — complementary, not replacement.S-tier for reasoning and writing. If you only pay for one chatbot, pay for this one — especially for long work.
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