We caught ChatGPT answering property questions with our data -- here's the nginx log proof

The moment we noticed Yesterday, while running our routine nginx log analysis, we spotted something unusual: 51.107.70.192 - [30/Mar/2026:19:42:35 +0000] "property.nwc-advisory.com" " GET /prices/sk10-1ae HTTP/2.0" 200 4623 "-" " Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot" A ChatGPT-User bot fetched one of our UK property landing pages. Not GPTBot (the training crawler). Not OAI-SearchBot (the indexer). The ChatGPT-User agent -- the one that fetches pages in real time to answer a user's question. Someone asked ChatGPT about house prices near Macclesfield (SK10 postcode), and ChatGPT pulled the answer from our page. What's the difference between OpenAI's bots? OpenAI operates three distinct crawlers. In the same 2-hour window, we saw all three: Bot User-Agent Purpose Our logs GPTBot GPTBot/1.3 Training data collection Crawling sitemaps, homepages OAI-SearchBot OAI-SearchBot/1.3 Search index building Crawling UK landing pages