GPT-4o vs Spell

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

	GPT-4o Writing	Spell Writing
Tagline	OpenAI's multimodal flagship behind ChatGPT.	AI-native document editor that drafts and rewrites in natural language, pitched as a Google Docs alternative.
Category	Writing	Writing
Pricing	Freemium· Free tier; Plus $20/mo; Pro $200/mo	Freemium· Free tier; Pro $20/mo; Team $40/user/mo
Model	GPT-4o	—
Editorial score	9.4 / 10	—
Use cases	general writingsummarizationvisionvoice mode	ai-draftingdocument-editingcollaborative-writingproposalsacademic-writing
Pros	Strong all-rounder Voice mode is uncannily good Huge ecosystem & plugins Available in ChatGPT, API, Copilot	Natural-language editing replaces formatting menus for rewrites and tone changes Real-time collaboration with permission controls on the Team plan Clean free tier so you can actually evaluate it before paying Exports cleanly to Word, PDF and Markdown
Cons	Style can be generic without nudging Hallucinates citations occasionally Context smaller than Claude on long docs	Underlying model is not disclosed, so capabilities are a black box No public API or third-party integrations advertised Closed-source with all documents stored in their cloud Pro at $20/mo is pricier than several established AI writing tools
Website	chatgpt.com	spellapp.com

Pick GPT-4o if

Pick Spell if

✅ Natural-language editing replaces formatting menus for rewrites and tone changes
✅ Real-time collaboration with permission controls on the Team plan
✅ Clean free tier so you can actually evaluate it before paying
✅ Exports cleanly to Word, PDF and Markdown