Answer · Writing
What AI models does Grammarly use?
Grammarly runs on Grammarly AI (Grammarly), Grammarly AI Assistant (Grammarly), Grammarly ML (Grammarly), Grammarly Proprietary AI (Grammarly), In-house NLP models (Grammarly) and Undisclosed frontier LLM (Provider undisclosed).
- Models used
- 6
- Primary model
- In-house NLP models
- Public API
- Yes
- Last checked
- 2026-09-06
Model claims are labelled by how we know them: Grammarly AI — inferred, Grammarly AI Assistant — inferred, Grammarly ML — unknown, Grammarly Proprietary AI — inferred, In-house NLP models — disclosed and Undisclosed frontier LLM — unknown. "Disclosed" means the vendor says so in public; "inferred" means it was derived from documentation, headers or release notes.
Context window: Not published.
Other stack signals: Browser extension and Native desktop.
Cite this answer
Tomorrow. “What AI models does Grammarly use?” Tomorrow AI & Emerging Tech Index, AlienSquad, updated 2026-09-06. https://tomorrow.aliensquad.ai/q/what-models-does-grammarly-use
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