AI Content Detector
AI Content Detector is a free online tool from Writer that scores pasted text for the probability of AI generation, handling up to 5,000 words per check. It detects content from ChatGPT, GPT-4, Gemini, and other models.
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Good for teachers, editors, and marketers needing a free, fast first-pass AI content screen; not suitable as the sole basis for high-stakes decisions like academic penalties.
Verified facts
What is AI Content Detector
AI Content Detector is a free online tool from Writer that scores pasted text for the probability of AI generation, handling up to 5,000 words per check. It detects content from ChatGPT, GPT-4, Gemini, and other models.
Key features of AI Content Detector
- Educators verifying originality of student assignments and papers
- Editors and journalists checking authenticity of submissions
- Marketers screening ad copy for originality before publishing
- Enterprises integrating AI detection into review pipelines via API
Good for
- Free basic detection — paste and get results in seconds
- Handles up to 5,000 words per check for long documents
- Provides editing suggestions and API integration
Watch out
- False positives and negatives exist — scores are reference only
- Deeper detection and API access tie into Writer's paid tiers
- Heavily rewritten AI text can evade detection
How to use AI Content Detector
- Open Writer's AI Content Detector page
- Paste the text into the detection area
- Run the check and wait a few seconds
- Read the AI-generation probability score
- Edit per suggestions and re-check, or accept the result
Who AI Content Detector is for
Difficulty: Beginner
- Educators verifying originality of student assignments and papers
- Editors and journalists checking authenticity of submissions
- Marketers screening ad copy for originality before publishing
- Enterprises integrating AI detection into review pipelines via API
FAQ
Is AI Content Detector free?
Basic detection is free with a 5,000-word limit per check; deeper capabilities and API integration belong to Writer's paid product tiers.
Which AI models can it detect?
It detects text from multiple mainstream models, including ChatGPT, GPT-4, and Google Gemini.
Can the score be used as a final verdict?
The score shows the probability of human authorship and should be treated as reference; combine it with human review for major decisions.
Sources and verification
Sources: writer.com (opens in a new tab)
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