Is Gemini-3 Content Detectable?

On November 18, 2025, Google announced the release of Gemini-3, highlighting that this latest model brings “A new era of intelligence.”

The latest version of Gemini was released just days after the latest ChatGPT model, GPT-5.1 (November 12, 2025), and just a day before xAI also released a new model, Grok 4.1 Fast.

But is Gemini-3-generated text still detectable? In this study, we analyzed whether Gemini-3 content is still identified as Likely AI by the industry-leading Originality.ai AI Checker.

The Quick Answer — Is Gemini-3 Text Detectable?

Yes, Originality.ai is 99%+ accurate at detecting Gemini-3 text across all models: 

• Lite = 99.5% accuracy
• Turbo = 99.9% accuracy
• Academic = 99.6% accuracy

The Gemini-3 Detectability Study

Google is continuously updating and releasing new AI innovations, like Gemini. 

At Originality.ai, we are committed to continuously testing and improving AI detection accuracy. It’s why Originality.ai is the most accurate AI detector.

So, with the release of Gemini-3, we tested just how detectable the text is with the industry-leading Originality.ai AI detector.

Let’s take a closer look at the results of our AI detection tests with Gemini-3.

The Gemini-3 Detectability Test

Although our AI detection models were not trained on Gemini-3 data, this study assesses their capability to identify Gemini-3-generated text.

The Dataset:

The dataset for this test followed a similar format to the test designed for GPT-5.1 and Grok.

5,000 High-quality human-written samples spanning:

• Domains/Topics: health, news, finance, technology, arts & entertainment
• Content Types: blogs, reviews, expository articles, conversational text
• Prompt Structures: to maximize stylistic and topical diversity

Then, Gemini was used to generate completions for each human-written sample prompt. 

Note: As Gemini 3 has just been released, it has some limitations, so we ran this test based on over 3000 samples.

This produced a balanced dataset to evaluate the accuracy of Originality.ai’s AI detection capabilities.

The Gemini-3 Detectability Results

Based on our tests, Originality.ai still has exceptional accuracy, with 99%+ accuracy at detecting text generated by Gemini-3.

These are the accuracy ratings for Gemini-3 by Originality.ai AI detection models:

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Final Thoughts

Although Gemini-3 didn’t exist when we trained our AI detection models, all of the AI detection models show a strong generalization performance and achieved 99%+ accuracy.

So, can you still detect Gemini-3 text? Yes! Originality.ai has exceptional accuracy (99%+) at detecting Gemini-3.

The results of our study emphasize that Originality.ai is still an effective way to detect the latest LLM models from Gemini-3 to GPT-5.1 and Grok 4.1 Fast.

Try Originality.ai’s AI detector today!

Learn more about AI detection accuracy:

• AI Detection Accuracy Study
• 3rd Party AI Detection Accuracy Studies: Meta-Analysis
• Which AI Detection Model Should I Use?
• Originality.ai’s Academic Model for Students and Teachers