Copilot & Bing AI Detector

Check if text was written by Microsoft Copilot or Bing AI. Covers Copilot in M365, Bing Chat, and Azure OpenAI-powered outputs. Free, no login.

Copilot & Bing AIFree Forever70–82% AccuracyNo Login

AI Text Detector

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Analyzing…

Narrative Academic
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Signal Breakdown tap to expand

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Accuracy note: Browser-based detectors achieve ~70–80% accuracy. Use as a screening tool, not sole evidence of AI use. How it works →

What Makes Copilot Writing Detectable

Microsoft's liability training and enterprise document corpus give Copilot four distinctive patterns that differ from standard ChatGPT output.

Diplomatic Hedging

Copilot adds "according to available information", "based on my knowledge", "you may want to verify" more than other models. Microsoft's legal liability training is plainly visible in every response.

Reference Dropping

Copilot frequently inserts "Learn more:", "Source:", or footnote-style citations even in creative writing. Bing search integration bleeds into writing style — it cites sources that were never asked for.

Corporate Neutrality

Copilot avoids strong opinions, uses passive voice and committee language: "It has been observed that", "It may be considered that", "Studies suggest". Classic enterprise document training.

Structured Formatting

Heavy use of bold headers, numbered lists, and clear section breaks even for short responses. Reflects Microsoft's Word/Teams/SharePoint training data where every output needs to look like a document.

Copilot Versions This Covers

All Copilot versions share GPT-4o's base patterns plus Microsoft-specific signals. Older versions score higher.

Copilot (Bing Chat) (~82%)Copilot M365 (~78%)Copilot Pro (~74%)Copilot + GPT-4o (~70%)
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Note: Copilot is powered by OpenAI's GPT family, so ChatGPT detection signals also apply. The unique Copilot markers are reference-dropping and corporate neutrality — signals not present in standard ChatGPT.

Accuracy & Limitations

Unedited Copilot (Bing Chat)78–82%
Copilot M365 / Pro70–78%
Human-edited Copilot40–58%
Heavily humanized25–42%

Copilot Detector FAQ

Yes. Copilot in Microsoft 365 outputs show reference-dropping, corporate neutrality, and structured formatting patterns. Detection rate ~70–78% on unedited output.
Copilot is GPT-4o with Microsoft-specific training. It adds liability hedging, unsolicited source citations, and corporate passive voice that standard ChatGPT avoids. Both share vocabulary spike patterns.
Yes. Bing AI is an earlier Copilot version that scores higher (~82%) because it was less optimized to avoid detection patterns. Reference-dropping is especially strong in Bing AI output.
Yes, completely free. All detection runs as JavaScript in your browser — no server, no API, no login, no word limits.