THE RECENCY BIAS THAT'S RESHAPING AI SEARCH

Summary from the TLDR Marketing newsletter

AI search models show a strong bias toward newer content, reshaping how visibility works across platforms like ChatGPT. A study by Waseda University found that timestamps alone can shift top-10 results by up to 5 years, move pieces up to 95 ranks, and reverse 8-25% of relevance judgments. Older, high-quality content is systematically buried, while newer, lower-quality material often ranks higher. GPT-4o and Qwen2.5-72B are the most resistant to this bias, while LLaMA3-8B and GPT-3.5-turbo are the most affected. To maintain visibility, brands should update content regularly and use strategies like timestamp management and temporal context signals.