Is Claude Opus 4.7 Content Detectable?

On April 16, 2026, Anthropic released Claude Opus 4.7. In the announcement, Anthropic notes that the latest Claude outperforms Opus 4.6 on “a range of benchmarks.”

However, is the AI-content generated from Claude Opus 4.7 still detectable by Originality.ai?

In this study, we analyzed whether Claude Opus 4.7 content is still identified as Likely AI by the industry-leading Originality.ai AI Checker.

The Quick Answer — Is Claude Opus 4.7 Text Detectable?

Yes, Originality.ai is highly accurate at detecting Claude Opus 4.7 text:

• Lite = 94% accuracy
• Turbo = 97% accuracy

The Claude Opus 4.7 Detectability Study

New LLMs are continuously being released, like Claude Opus 4.7 from Anthropic (previous Claude models included Claude 4 Sonnet and Opus).

Recently, other AI companies have also launched new models such as GPT-5.5 or GPT-5.3 Instant, and GPT-5.4 from OpenAI, and Gemini 3 from Google. 

With AI continuing to improve, it’s essential for AI detectors to test their accuracy on the latest LLMs.

Check out an overview of our Claude Opus 4.7 test below.

The Claude Opus 4.7 Detectability Test 

Although our AI detection models were not trained on Claude Opus 4.7 data, this study assesses their capability to identify text generated by Claude Opus 4.7.

The Dataset:

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, Claude Opus 4.7 was used to generate completions for each human-written sample prompt. 

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

The Claude Opus 4.7 Detectability Results

After testing the Originality.ai AI detection models on this dataset, we found that Claude Opus 4.7 is still highly detectable by the industry-leading Originality.ai AI detector.

These are the accuracy ratings for Claude Opus 4.7 by Originality.ai AI detection models:

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Final Thoughts

Although Claude Opus 4.7 didn’t yet exist when the Originality.ai AI detection models were trained, Lite and Turbo show a strong generalization performance and achieved an accuracy of 94-97%.

So, yes — Claude Opus 4.7 is still highly detectable by Originality.ai!

Whether you’re a student, teacher, writer, or editor, maintain AI transparency and find out whether content is Likely AI or human-written with Originality.ai.

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

AI studies for recently released models:

• Gemini 3
• Grok 4.1 Fast
• GPT-5.3 Instant and GPT-5.4
• GPT-5.5
• Llama 4 Maverick and Llama 4 Scout