ChatGPT vs Grammarly (2026): Which Is Better?
Winner
ChatGPT is the better pick for most people as of September 2026, rated 4.7/5 versus 4.4/5 for Grammarly. Both have free plans. Grammarly is the better choice for everyday proofreading.
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Compiled from BestAI's full reviews of ChatGPT and Grammarly, using the same ratings, pricing and test notes. See our review methodology.
ChatGPT vs Grammarly: side-by-side
| Criterion | ChatGPT | Grammarly |
|---|---|---|
| BestAI rating | 4.7/5 | 4.4/5 |
| Starting price | $20/mo | $12/mo |
| Free plan | Yes | Yes |
| Pricing model | Freemium | Freemium |
| Ease of use | 5.0/5 | 5.0/5 |
| Features | 5.0/5 | 4.0/5 |
| Output quality | 5.0/5 | 4.0/5 |
| Value for money | 4.0/5 | 4.0/5 |
| Platforms | API, iOS, Mac, Web, Android, Windows, Chrome extension | iOS, Mac, Web, Android, Windows, Chrome extension |
| API access | Yes | No |
| Best for | General writing and brainstorming | Everyday proofreading |
| Company | OpenAI, 2022 | Grammarly, Inc., 2009 |
Strengths and weaknesses
ChatGPT
- Extremely capable general-purpose assistant
- Huge ecosystem of custom GPTs and plugins
- Web browsing, code execution, and image generation built in
- Frequent model and feature updates
- Advanced features are gated behind the paid plan
- Usage limits even on paid tiers during peak demand
- Can produce confident but incorrect answers on niche topics
Grammarly
- Works nearly everywhere you write on the web
- Reliable core grammar and spelling checks
- Generative writing and rewriting built in
- Team style guide and brand tone features
- Advanced clarity/tone and plagiarism checks require Pro
- Generative suggestions can feel generic without customization
- Business plans priced per seat can add up for larger teams
Key features
ChatGPT
- Multi-model chat with reasoning and fast modes
- Web browsing and citations
- Code execution sandbox
- Image generation and understanding
- Custom GPTs
- API access for developers
Grammarly
- Real-time grammar and spelling checks
- Clarity and tone suggestions
- Generative writing and rewriting
- Plagiarism checking (Pro)
- Browser, desktop, and Office integration
Which should you choose?
Choose ChatGPT if you need:
- General writing and brainstorming
- Coding help
- Quick research summaries
- A free plan (paid plans from $20/mo)
Choose Grammarly if you need:
- Everyday proofreading
- Professional email and documents
- Team style consistency
- A free plan (paid plans from $12/mo)
Frequently asked questions
Is ChatGPT better than Grammarly?+
For most people, ChatGPT comes out ahead: BestAI rates it 4.7/5 against 4.4/5 for Grammarly. Grammarly is still the better fit for everyday proofreading.
Which is cheaper, ChatGPT or Grammarly?+
Grammarly is cheaper, starting at $12/mo versus $20/mo for ChatGPT. Both have free plans.
Do ChatGPT and Grammarly have free plans?+
ChatGPT has a free plan (access to a default model with rate limits; advanced models are limited or unavailable). Grammarly has a free plan (core grammar, spelling, and basic clarity checks).
What is the main difference between ChatGPT and Grammarly?+
ChatGPT is best for general writing and brainstorming, and its standout strength is extremely capable general-purpose assistant. Grammarly is best for everyday proofreading, with works nearly everywhere you write on the web as its biggest advantage.