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Core concept · AI Search Infrastructure

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Definition

Freshness weighting is the degree to which a platform’s retrieval system favors recently published or updated content over older content with otherwise similar relevance scores. The weighting varies significantly across platforms. The platform difference is operationally significant: ChatGPT-cited URLs average 393–458 days newer than organic Google results for the same queries. Perplexity also exhibits strong freshness preference. Google AI Overviews do not — average cited content age on AIO is approximately 1,432 days, nearly identical to traditional organic results. For brands deciding where to invest publishing resources for AI citation, freshness weighting tells you which platforms reward it and which do not.

Freshness signal

OAI-SearchBot

PerplexityBot

Content velocity

Training cutoff

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