ChatGPT vs Grammarly——どっちが優秀？
ChatGPTを選ぶべき人: みんな向け — 最強の汎用モデルを持つAIライティングのスイスアーミーナイフ
Grammarlyを選ぶべき人: メール・ドキュメント・投稿を書く全ての人向け — どこでもミスをキャッチする常時オンのセーフティネット
私たちの見解: ChatGPT for simplicity, Grammarly for power users.
| ChatGPT | Grammarly | |
|---|---|---|
| 料金 | Free with GPT-4o mini | Plus $20/mo | Free with basic grammar and spelling checks | Pro $12/mo |
| 機能 | Conversational AI writing, Custom GPTs, DALL-E image generation, Code interpreter, Web browsing and file analysis | Real-time grammar, spelling, and punctuation corrections, Tone detection and rewrite suggestions, AI text generation and reply drafting, Works everywhere via browser extension and desktop app, Plagiarism checker on paid plans |
| こんな人に最適 | Everyone — the Swiss Army knife of AI writing with the best general-purpose model | Anyone who writes emails, docs, or posts and wants an always-on safety net that catches mistakes everywhere |
| 学習コスト | 簡単 | 簡単 |
本当の違い
Both offer free tiers, so the real question is what you get when you start paying.
ChatGPT stands out with Conversational AI writing and Custom GPTs. Grammarly counters with Real-time grammar, spelling, and punctuation corrections and Tone detection and rewrite suggestions.
ChatGPT's Achilles heel: not purpose-built for marketing — no brand voice, no templates, no team workflow. you have to prompt-engineer everything yourself. Grammarly's: suggestions can be overly conservative and strip personality from your writing if you accept everything blindly. Pick whichever weakness you can live with.
結論
If you value conversational ai writing and みんな向け — 最強の汎用モデルを持つaiライティングのスイスアーミーナイフ, go with ChatGPT. If メール・ドキュメント・投稿を書く全ての人向け — どこでもミスをキャッチする常時オンのセーフティネット matters more, Grammarly is your pick. Neither is a bad choice — but one will fit your workflow better.