ChatGPT vs Grammarly
Cheapest paid tier each vendor publishes. Free plans are listed above; tiers priced on request are not plotted because there is no figure to plot.
Where they differ
Only on ChatGPT
- Lower entry price: $8/mo against $30/mo
- AI chat
- Summarization
- Research
Only on Grammarly
- Grammar checker
- Spell checker
- Tone detection
- Also on Chrome extension
From the pricing tiers and capability tags we track. A capability missing on one side means we have not recorded it there, not that the tool cannot do it.
At a glance
ChatGPT and Grammarly both appear in this directory's writing listings. Prices below were read from the vendors' own pages, most recently on October 26, 2026. Paid plans start at $8/mo on ChatGPT and $30/mo on Grammarly. We track ai chat on ChatGPT and grammar checker on Grammarly; both cover generative writing and writing assistant. No score and no winner: the facts do the picking.
Capability tags are factual labels we assign when a tool is added; they describe what a tool does, not how well it does it.
Checked against the vendors. Written from each vendor's own site and last re-checked there: ChatGPT (under review since October 26, 2026) · Grammarly on October 12, 2026. Vendors change pricing and features without notice, so confirm anything that decides your purchase on the vendor's page.
ChatGPT
Conversational AI model for text generation and interaction
ChatGPT is an AI chatbot developed by OpenAI. It generates human-like text responses based on user prompts. The tool is accessible via its web interface and offers a mobile app for iOS and Android.
Grammarly
Grammar, style, and generative writing help across your apps
Grammarly checks grammar, spelling, punctuation, and tone, and can rewrite or generate text on demand. It works as a browser extension, desktop app, keyboard, and inside Microsoft Word and Google Docs.
Also in writing
A tool we have an affiliate relationship with. It is not part of the comparison above and we are not calling it the better pick.
- Paraphrasing and rewriting text
- Checking essays and articles for plagiarism
- Generating academic citations
Key features
ChatGPT
- Generates text responses to prompts
- Supports conversational dialogue
- Processes and synthesizes information
- Offers a web interface and mobile applications
- Integrates with third-party tools via plugins
Grammarly
- Grammar, spelling, and punctuation checks
- Tone and clarity suggestions
- Generative rewriting and drafting prompts
- Works in the browser, desktop, Word, Google Docs, and mobile
- Team style guides on Business plans
What each one does well
ChatGPT
- ✓ Generating creative content and drafts
- ✓ Answering factual questions and explaining concepts
- ✓ Summarizing long documents or conversations
Grammarly
- ✓ Catching typos and awkward phrasing across every app you write in
- ✓ Adjusting the tone of an email or message before you send it
- ✓ Team style consistency across many writers
People also ask
Which is cheaper, ChatGPT or Grammarly?
ChatGPT is cheaper: paid plans start at $8/mo for ChatGPT and $30/mo for Grammarly.
Does ChatGPT or Grammarly have a free plan?
Both ChatGPT and Grammarly publish a free plan.
What is the difference between ChatGPT and Grammarly?
ChatGPT and Grammarly are both tracked for generative-writing, writing-assistant. Of the capabilities they do not share, only ChatGPT is tracked for ai-chat, summarization, research, and only Grammarly is tracked for grammar-checker, spell-checker, tone-detection.
How much do ChatGPT and Grammarly cost?
ChatGPT: free plan, then $8/mo. Grammarly: free plan, then $30/mo.
Answers are generated from the tracked plans and capability tags shown above, so they move when the vendors' pages do.
Full fact sheets, FAQs, and discussion links: ChatGPT · Grammarly · all writing tools