GPT-4o vs QuillBot

A side-by-side look at pricing, capabilities, pros, cons, and our editorial scores.

	GPT-4o Writing	QuillBot Writing
Tagline	OpenAI's multimodal flagship behind ChatGPT.	AI paraphrasing and grammar suite that grew into an all-in-one writing toolkit.
Category	Writing	Writing
Pricing	Freemium· Free tier; Plus $20/mo; Pro $200/mo	Freemium· Free tier with word limits; Premium from ~$9.95/mo (billed annually)
Model	GPT-4o	Undisclosed (proprietary)
Editorial score	9.4 / 10	—
Use cases	general writingsummarizationvisionvoice mode	paraphrasinggrammar-checksummarizationcitation-generationtranslationplagiarism-check
Pros	Strong all-rounder Voice mode is uncannily good Huge ecosystem & plugins Available in ChatGPT, API, Copilot	Polished paraphraser with multiple rewriting modes including Formal, Creative, and Shorten Genuinely useful free tier covers the most common student and ESL workflows Deep integration via Chrome, Word, and Google Docs extensions Bundles citation, summarizer, and grammar tools so you rarely leave the tab
Cons	Style can be generic without nudging Hallucinates citations occasionally Context smaller than Claude on long docs	Does not disclose underlying models or how content is processed AI detector and 'humanizer' are unreliable in the detector arms race Breadth means individual tools are competent rather than best-in-class Free tier word limits push heavier users toward Premium quickly
Website	chatgpt.com	quillbot.com

Pick GPT-4o if

Pick QuillBot if

✅ Polished paraphraser with multiple rewriting modes including Formal, Creative, and Shorten
✅ Genuinely useful free tier covers the most common student and ESL workflows
✅ Deep integration via Chrome, Word, and Google Docs extensions
✅ Bundles citation, summarizer, and grammar tools so you rarely leave the tab