Grammarly
Grammar, tone and generative rewriting across browser, desktop and mobile.
Full Grammarly record →Head to head
Grammarly vs Grok
Grammarly (Grammarly) and Grok (xAI) both sit in Writing. Grok is the cheaper entry point at from $2/mo. Grok shipped more tracked changes in the last 30 days (10 vs 0). Every value below comes from the latest crawl of the vendors' own pages.
| Attribute | Grammarly Grammarly | Grok xAI |
|---|---|---|
| Segment | Writing | Writing |
| Version | Pro | Grok 4.7 |
| Entry cost | Free tier · from $12/mo | from $2/mo |
| Pricing tiers | Free free · Pro $12 · Enterprise free | Grok 4.7 Input (per 1M tokens) $2 · Grok 4.7 Output (per 1M tokens) $6 |
| Model stack | Grammarly AI · Grammarly AI Assistant · Grammarly ML · Grammarly Proprietary AI · Grammarly proprietary ML/AI · In-house NLP models · Undisclosed frontier LLM | grok-4.5 · grok-4.6 · grok-4.7 · grok-imagine-image · grok-imagine-image-2.0 · grok-imagine-image-quality · grok-imagine-video · grok-imagine-video-1.5 |
| Context window | Not published | 500000 |
| Public API | ||
| Routes models | ||
| Changes / 30d | 0 | 10 |
| Origin | Global | Global |
| Capabilities | Grammar and tone, Generative rewriting, Plagiarism detection, AI detection, Docs editor, Grammar Checker, Plagiarism Checker, AI Detector | Real-time X search, Think and Big Brain modes, Voice mode, Image generation, API access, text generation, agentic coding, voice agent |
Grok
Grok pairs xAI's in-house models with live access to the X firehose, sold standalone and bundled into X Premium tiers.
Full Grok record →