The update cadence by engine
Understanding how often each engine refreshes its knowledge helps you plan your GEO program and set realistic expectations for when changes appear.
Perplexity: Near-real-time
Perplexity's architecture is fundamentally different from training-data engines. For most queries, it crawls the live web at query time and synthesizes answers from current content. This means changes you make to your website — new articles, updated service descriptions, corrected schema — can appear in Perplexity responses within days of publishing.
Perplexity is the fastest signal propagation environment and the best engine for quickly testing whether new content is being picked up.
Google AI Overviews: Rolling index + GBP
Google AI Overviews draws on Google's continuously updated search index. Most pages are re-crawled within days to weeks of significant changes. High-authority pages with frequent updates are crawled more often.
GBP updates propagate faster — typically 24–72 hours for category changes and description updates, and almost immediately for hours and review responses.
ChatGPT: Training data + Browse
ChatGPT's knowledge has two layers:
- Training data: Updated on a periodic cycle (typically aligned with major model releases). Information added to the web after a training cutoff date may not appear in non-Browse responses.
- Browse: When activated, Browse accesses live web content. Not all queries trigger Browse — and even when triggered, it depends on whether your content is indexed and accessible.
For entity-level information (who is your business, what do you do), expect changes to propagate into ChatGPT's training data on a 3–6 month cycle after a major model update.
Gemini: Google index + GBP
Gemini draws heavily from Google's knowledge graph, meaning its update cadence closely follows Google's — faster for GBP and schema changes, slower for deep entity model updates.
The practical implication
Publish new content and schema corrections, then:
- Submit updated URLs to Google Search Console for accelerated indexing
- Wait 1–2 weeks and test in Perplexity (fastest feedback)
- Wait 3–6 weeks and test in Google AI Overviews
- Wait 6–12 weeks and test in ChatGPT (slowest propagation)
