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AI writing assistant with grammar, tone, and style suggestions for professional communication
Refreshed weekly
Built on
The underlying foundation model(s) this product runs on, per publicly disclosed evidence.
- OpenAI GPT-4primary
Grammarly's 2023 announcement of generative AI features powered by OpenAI's GPT-4
vendor-confirmedEvidence - Grammarly Grammarly GenAI (proprietary)primary
Grammarly's own fine-tuned generative AI models for writing suggestions and rephrasing
vendor-confirmedEvidence
Model details
- Model family
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- Base model
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- Context window
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- Input modalities
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- Output modalities
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- Access
- Proprietary
- Pricing
- subscription
- API available
- Yes
Mantle Index
Equity Score
MixedMeasures fairness across demographic groups. Higher is more equitable.
Safety Score
MixedMeasures resistance to harmful outputs. Higher is safer.
Component scores
Component scores
The Equity Score and Safety Score roll up the latest Mantle Index assessment. Component breakdowns and risk-tier justification are available on Pro and Enterprise.
Benchmark sub-scores
Benchmark scores
Security score
Computed from compliance, encryption, data handling, documentation, and vendor contacts — multiplied by research confidence (medium).
5 category scores
Vendor contacts
Contacts on file
Certifications
- SOC 2 Type II
- ISO 27001
- GDPR
Research coverage
0 dimensions fully covered · 0 partially covered.
Supply chain
No supply-chain links recorded yet.
Citations
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Recent changes
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