Grammarly has released a free AI-authorship checker that highlights which parts of a document are human-typed, AI-generated, or AI-edited, without using proprietary detection algorithms. Dubbed Grammarly Authorship, this tool offers transparent insights into writing origins—helping users prove authenticity in an era of increasing AI usage. Grammarly AI detection tool marks a significant advancement in responsible AI for writing.
🔍 How It Works
- Authorship transparency: The tool tracks each portion of text, showing what was typed by the user, generated by AI, pasted from elsewhere, or tweaked with Grammarly—via a playback of editing history.
- Wide integration: Currently available in beta on Google Docs (from September), with upcoming support for Microsoft Word and Pages later in 2025. inc.com
- Complement, not replacement: Designed to supplement basic AI detection and plagiarism checks—adding context rather than definitive judgment.
🧠 Why It Matters
- Enhances originality verification: Users can evidence the authenticity of their writing process—useful in academic, professional, and creative contexts.
- Reduces false positives: By visualizing edits and AI involvement, users gain clarity beyond unreliable percentage scores.
- Protects student rights: Academics can better verify integrity without unjustly penalizing students using Grammarly’s non-generative features.
🧾 Early Feedback & Limitations
- Detection accuracy varies: Grammarly’s basic AI checker shows limited accuracy (around 33–37%) and often flags wrongly.
- False flags common: Users report harmless writing—especially polished prose—being erroneously flagged as AI-generated.
- Transparency benefits: Authorship’s timeline playback offers better reliability than generic AI-percentage alerts.
✅ Summary
Grammarly’s Authorship tool marks a new chapter in AI-writing transparency by showing exactly which parts of a document are AI-generated, user-typed, or AI-edited. While clarity tools like this help build trust, users should still interpret results carefully given occasional false flags. As Grammarly expands integrations, this tool promises more accurate and fair authorship verification.
