Writing & detection
Grammarly AI Detector
Grammarly’s free AI checker for ChatGPT, Claude, and more.
Product insights
Grammarly AI Detector at a glance
Value proposition
Free detection from a writing brand many people already use.
Problem solved
It is hard to know whether a piece of text was written by AI.
Audience
Students, teachers, and professionals.
Pricing and access
The AI Detector is free; Grammarly’s other features have paid plans.
Market
- AI detection
- Writing tools
Tech stack
- AI text classifier
- RAID benchmark
01Why it is here
What is Grammarly AI Detector?
Grammarly AI Detector is a free online checker. Paste text and it estimates how much was likely written by AI, benchmarked on the independent RAID dataset.
02Workflow
How to use Grammarly AI Detector
- 01
Open the detector
Go to grammarly.com/ai-detector.
- 02
Paste text
Add the text you want to check.
- 03
Read the score
Review the estimated share of AI text.
03Capabilities
Key features of Grammarly AI Detector
- Free AI detection
- Detects ChatGPT, GPT-6, Claude
- 99% accuracy on RAID (claimed)
- Works with Grammarly tools
04Use cases
What is Grammarly AI Detector best for?
- Checking essays
- Reviewing team content
- Personal writing checks
05Questions
FAQ about Grammarly AI Detector
Is Grammarly’s AI Detector free?
Yes, the AI Detector is free to use.
How accurate is it?
Grammarly reports 99% accuracy on RAID’s independent benchmark; treat results as guidance.
Official website snapshot
grammarly.com
Grammarly’s free AI Detector checks whether text was generated by models such as ChatGPT, GPT-6, and Claude. Grammarly says it reaches 99% detection accuracy on RAID’s independent benchmark.
