We analyzed 900,000 newly created internet pages in April 2025 and located that 74.2% of them contained AI-generated content material.
At Ahrefs, our machine studying staff has constructed an AI content material detector (codenamed bot_or_not). We’re about to launch the AI content material detector for Ahrefs prospects to make use of, so we determined to place it by its paces with a query we’ve been dying to reply:
What proportion of latest content material is AI-generated?
We’re about to launch our AI content material detector as a part of the Web page Examine device in Web site Explorer.
We used bot_or_not to research 900,000 English-language internet pages that have been newly detected by our internet crawler in April 2025. We analyzed one web page per area (so we examined content material from 900,000 totally different domains). Every web page was categorized in line with the share of the web page our mannequin detected as being AI-generated.
Right here’s what our content material detector discovered:
- 2.5% of pages have been categorized as “pure AI.”
- 25.8% have been categorized as “pure human.”
- 71.7% have been categorized as a mixture of the two.
Of those who contained a mixture of AI and human content material:
- 25.86% confirmed average AI use (11%–40% of the web page content material was categorized as AI)
- 20.50% confirmed substantial AI use (41%–70%)
- 15.51% confirmed dominant AI use (71%–99%)
I used to be stunned that nearly three-quarters of the pages we analyzed included AI content material. However the longer I sat with the information, the extra it made sense.
Free, quick AI content material technology is offered natively in Google Docs, in Gmail, in LinkedIn. AI can summarize Slack messages, conduct article analysis, shorten transcripts. It’s actively troublesome to keep away from the large, shiny “generate” button, and can solely turn into harder as generative AI turns into additional embedded in purposes.
An instance of generative AI obtainable natively in Google Docs.
And, as extra AI-generated content material is created, the brand new content material that references that AI-generated content material will, in flip, embody AI-generated materials. The presence of AI content material will unfold at an ever sooner charge, tainting all the things it touches to a larger or lesser extent.
If extra validation was wanted, after I surveyed 879 content material entrepreneurs, 87% reported utilizing AI to create or assist create content material. Simply 13% reported that they didn’t use AI in any capability.
And, unsurprisingly, weblog posts have been the most typical content material kind created by AI: 
LLMs are too handy and too low-cost to be ignored. Utilizing generative AI in content material creation is shortly changing into the default.
No AI content material detector is ideal. Totally different detection strategies have totally different strengths and weaknesses, however all AI detection instruments share comparable struggles: they’re typically educated on slender datasets, they wrestle with partial detection, and they’re weak to humanising instruments.
Our staff understands these limitations and constructed our device with these issues in thoughts. We’ve had nice outcomes from testing our content material detector on Ahrefs content material, however—like each different market-leading content material detector—it’s going to by no means be 100% correct.
However no website positioning metric is 100% correct. All of us use search quantity knowledge to form our technique, however as we’ve written earlier than, there’s no such factor as “correct” search quantity. In the identical manner, AI content material detection may be extraordinarily useful with out being good.
You’ll be able to see how a lot AI content material your opponents publish, which fashions they use, and the way that modifications over time.
You’ll be able to estimate how a lot AI content material is current in a selected SERP, and work out if you might want to make investments extra effort to rank.
You’ll be able to even perceive how natural efficiency metrics, like search visitors, key phrase rankings, and backlinks, correlate with totally different ranges of AI use (as I kind, we’re operating a research on this).
These instruments shouldn’t be utilized in isolation to make life-or-death selections about somebody’s profession—however they’re a superb supply of knowledge for high-performing entrepreneurs within the period of AI content material.
Begin utilizing our new AI content material detector
Our AI detection device is about to launch as a part of Web site Explorer. You’ll additionally have the ability to strive our mannequin totally free as a part of our revamped free AI content material detector.
