ChatGPT vs Grammarly
A detailed side-by-side comparison to help you choose.
ChatGPT
OpenAI's flagship conversational AI assistant for everyday tasks and coding
Grammarly
AI writing assistant that checks grammar, style, tone, and clarity across all platforms
Our verdict
We recommend ChatGPT
Both tools are excellent choices, but ChatGPT has a slight edge in our overall scoring.
Feature Comparison
| Feature | ChatGPT | Grammarly |
|---|---|---|
| API Access | ||
| Plugins / Extensions | ||
| Image Generation | ||
| Code Execution | ||
| File Upload | ||
| Web Search | ||
| Max Context Window | 128K tokens | 16K tokens |
Pricing Comparison
| Tier | ChatGPT | Grammarly |
|---|---|---|
| Free | Free GPT-5.6 Luna unlimited text chats; limited uploads, image gen, voice, deep research, Codex | Free Basic grammar & spelling, 100 AI prompts/month |
| Go | $8 More messages with tools, uploads, image gen, longer memory; plan may include ads | $30 2,000 AI prompts/month, full rewrites, plagiarism & AI detection; $12/mo billed annually |
| Plus | $20 GPT-5.6 advanced reasoning; expanded messages/uploads, deep research, Agent mode; no ads | $40 Email + writing suite, style guides, analytics; $33/member/mo billed annually |
| Pro 5x | $100 5x Plus usage; GPT-5.6 Sol Pro reasoning; maximum Codex tasks | Free Custom pricing; SSO/SAML, SCIM, BYOK, dedicated support |
| Pro 20x | $200 20x Plus usage; unlimited Sora; 1M-token context window | — |
| Business | $25 Per user (min 2 seats), admin controls; $20/seat if billed annually | — |
Score Breakdown
| Dimension | ChatGPT | Grammarly |
|---|---|---|
| Ease of Use | 9.0 | 10.0 |
| Features | 9.0 | 7.0 |
| Value for Money | 8.0 | 7.0 |
| Support | 7.0 | 8.0 |
| Overall | 8.3 | 8.0 |
Pros & Cons
ChatGPT
Pros
- +Most widely used AI assistant with massive community
- +Excellent code generation and debugging capabilities
- +Free tier available with competitive features
- +Supports image generation via DALL-E integration
Cons
- −Free tier has usage caps on advanced models
- −Pro plan at $200/month is expensive for casual users
- −Context window smaller than some competitors
Grammarly
Pros
- +Works everywhere: browser, Word, Google Docs, Outlook
- +Real-time suggestions don't interrupt your writing flow
- +Tone detection helps match the right voice for your audience
- +Plagiarism checker integrated into premium plans
Cons
- −Premium plan is expensive relative to the feature set
- −Not a full AI writing assistant — focused on editing, not generation
- −Free tier is quite limited compared to competitors