AI-Generated Content Now Dominates 35% of New Websites, Bringing Uniformity and Unrelenting Cheer

The internet is undergoing a profound transformation, with AI-generated content now accounting for a substantial portion of new websites. By mid-2025, a staggering 35% of newly published websites featured partially or fully AI-generated text, a figure that has skyrocketed from essentially zero just a few years prior. This phenomenon is not limited to any particular niche or industry, but rather is a broad-based trend that is redefining the character of online discourse.

The study, which analyzed a representative sample of English-language websites from the Internet Archive's Wayback Machine, employed a robust AI detection tool to identify AI-generated text. The results show that AI-generated texts exhibit a high degree of semantic similarity, with a 33% increase in similarity compared to human-written content. This suggests that language models are gravitating towards the mean of their training data, resulting in a narrowing of the range of ideas and perspectives presented online. Furthermore, AI-generated texts are characterized by an artificially upbeat tone, scoring 107% higher on positive sentiment than fully human-written content.

The implications of this trend are far-reaching and multifaceted. On one hand, the increasing prevalence of AI-generated content may lead to a more sanitized and homogeneous online environment, where dissenting voices are marginalized and alternative perspectives are suppressed. On the other hand, the ability of AI models to generate high-quality content at scale may democratize access to information and enable new forms of creative expression. However, as AI researcher Jonas Dolezal notes, the key to unlocking the full potential of AI-generated content lies in allowing models to develop a more distinct personality and voice, rather than simply forcing them to conform to established norms.

In terms of competitive context, the study's findings highlight the rapid progress being made in the field of natural language processing, with AI models like ChatGPT and GPT-4o-mini demonstrating unprecedented capabilities in generating coherent and engaging text. However, these advancements also raise important questions about the role of human judgment and oversight in the content creation process, and the need for more nuanced and sophisticated approaches to evaluating the quality and accuracy of AI-generated content.

For developers and businesses, the rise of AI-generated content presents both opportunities and challenges. On the one hand, AI-powered content creation tools may enable companies to produce high-quality content at scale, while also reducing costs and improving efficiency. On the other hand, the increasing reliance on AI-generated content may also lead to a loss of control and agency over the content creation process, as well as a diminished ability to differentiate oneself in a crowded and increasingly homogeneous online landscape.