LLM crawler share

What it is

LLM crawler share is the proportion of crawler traffic coming from AI bots such as GPTBot, ClaudeBot, Google-Extended, and PerplexityBot, relative to classical search crawlers. It shows how much of your crawl budget AI systems now consume.

Why it matters

It is a leading indicator of upcoming citation activity, because models tend to crawl and ingest content before they begin citing it, so rising AI crawl often precedes rising visibility.

How it works

Practitioners parse server logs by user agent to separate AI bots from traditional crawlers, then ensure those bots are allowed and can reach the content they want surfaced.

When it applies

Watch it as an early signal that AI systems are paying attention to your site before citations appear.

Examples

• GPTBot and ClaudeBot requests rising as a share of total crawls
• A site noticing AI crawl spikes shortly before new citations appear
• A team checking robots rules are not blocking the AI bots they want
• Comparing AI vs classical crawler share month over month

How it is measured

• AI bot requests divided by total crawler requests
• Crawl frequency per AI bot
• Pages crawled by AI bots vs classical crawlers
• Lead time between AI crawl increases and first citations