Credits from $4.99
Grammar Checker AI

Guide and comparison

ChatGPT grammar checker: a prompt that keeps your words

ChatGPT can check grammar if you ask it the right way. Copy the prompt below, or use Grammar Checker AI, a separate tool that returns the corrected text and a numbered list of fixes every time.

Try the dedicated checkerSee pricing
  • Free prompt to copy
  • Side-by-side comparison
  • Not affiliated with OpenAI
Language
Depth
0 / 3,000 words

Corrected text

Paste your text and press Check grammar. The corrected text and the main fixes appear here.

At a glance

For a ChatGPT grammar checker that keeps your words, ask ChatGPT to correct only errors, keep everything else and list each change; the prompt on this page does that. Grammar Checker AI is a separate, independent tool, not affiliated with OpenAI: it runs Claude Haiku 5.5 with fixed proofreading rules and six language settings, and returns the corrected text plus up to 12 main fixes at 1 credit per word, paid with purchased credits.

ChatGPT
OpenAI's chatbot; checks grammar when your prompt asks it to
Grammar Checker AI
Independent; Claude Haiku 5.5 with fixed proofreading rules
Free prompt
A proofreading prompt to copy, on this page
Affiliation
Not affiliated with OpenAI
Price
1 credit per word, 20-credit minimum; $0.08 to $0.20 per 1,000 words

Why a dedicated checker can help

  • 01

    The same rules every time

    You do not write a prompt. Each check uses the same proofreading rules, so the result does not depend on how you phrased the request.

  • 02

    Errors only, if you want

    Proofread changes what is wrong and leaves correct sentences exactly as they are.

  • 03

    A list of what changed

    Up to 12 main fixes with the original words, the correction and the reason, in the same format each time.

  • 04

    History and a price per word

    Your checks are saved to your account, and you see the credit cost before each one.

How to check grammar with ChatGPT

  1. 01

    Paste the prompt first

    Copy the prompt below into a new chat, so earlier messages do not change the result.

  2. 02

    Add your text

    Paste the text under the prompt, a few paragraphs at a time.

  3. 03

    Compare the changes

    Read the list of changes and check that nothing you meant was rewritten.

A ChatGPT grammar checker prompt you can copy

Paste this into ChatGPT, followed by your text: "Proofread the text below. Correct only errors in spelling, grammar, punctuation and capitalization. Keep every sentence that is already correct exactly as written, and do not change my style, tone, word choice or meaning. Keep my paragraphs and formatting. Return the corrected text first, then a numbered list of each change in the form: original → correction: reason."

The prompt works the same way in other chatbots. Long texts may drift into rewriting, so check a few paragraphs at a time and compare.

When ChatGPT is enough

For a quick check of a short message, a chatbot with a clear prompt may be all you need. OpenAI offers ChatGPT on free and paid plans; check OpenAI's current terms for limits.

When a dedicated grammar checker helps

A tool built only for grammar checks is worth it when:

  • You check text often and want the same rules each time without writing a prompt.
  • You need errors fixed without your style being changed.
  • You want a list of fixes in the same format to review or learn from.
  • You write in German, Japanese or Chinese and want each fix explained in English.

More checkers and guides

Grammar Checker AI and ChatGPT for grammar checks

Grammar Checker AIChatGPT with a prompt
InstructionsFixed proofreading rulesYour prompt, each time
ResultCorrected text, then a list of fixesWhatever the prompt asks for
Leaves correct text aloneYes, with proofreadWhen the prompt asks for it
ModelClaude Haiku 5.5, made by AnthropicOpenAI's models
Price$0.08 to $0.20 per 1,000 wordsFree and paid plans from OpenAI
Made byAn independent teamOpenAI

ChatGPT grammar checker FAQ

Is Grammar Checker AI made by OpenAI or part of ChatGPT?

No. Grammar Checker AI is an independent web app. It is not affiliated with, endorsed by or sponsored by OpenAI. It uses Claude Haiku 5.5, a model made by Anthropic, through a commercial model API.

Is ChatGPT good at checking grammar?

It can be, if you tell it to correct errors only and list the changes. Without that, a chatbot may also rephrase sentences that were correct. Whatever tool you use, read the changes before you accept them.

Why pay for a checker when ChatGPT has a free plan?

If ChatGPT's free plan and a good prompt cover your needs, use them. Grammar Checker AI is for people who want fixed rules, a list of fixes in the same format each time, six language settings and a price per word.

Can I use the prompt on this page for free?

Yes. The prompt is free to copy and use in ChatGPT or any other chatbot; it is plain text and needs no account on this site.

Skip the prompt and check your text

Packs start at $4.99 for 25,000 credits. Signing up is free; checks use purchased credits.

Try the dedicated checker

Last updated October 23, 2026

Create your Grammar Checker AI account