Study: 80% of top search results are human-written vs 10% AI-generated

yangyi · x · 2026-08-29

Data: Semrush analyzed 42,000 blog posts across 20,000 keywords. Content classified as fully human-written holds the top search spot 80.5% of the time, compared to just 10% for AI-generated content.

Ranking Gap: The performance gap is significant in the top 5 positions but narrows considerably beyond position 5, suggesting AI content is competitive for lower rankings.

Perception vs Reality: While 72% of SEOs believe AI content ranks as well as human content, real-world data shows search engines heavily reward human originality at the very top.

Author Take: The author insists on 100% human-written content for their Substack, viewing human originality as a scarce resource amidst AI abundance.

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