Not in ChatGPT search. GPTBot is OpenAI's training crawler; the search index is built by OAI-SearchBot, and live reads are done by ChatGPT-User. Blocking GPTBot keeps your pages out of future training data and leaves search alone. Blocking OAI-SearchBot or ChatGPT-User removes you from answers.
The three agents
OAI-SearchBot builds the index ChatGPT searches. ChatGPT-User fetches a page when a user's prompt sends ChatGPT to it. GPTBot collects pages for training. OpenAI documents them separately and they honour robots.txt separately.
What most sites got wrong in 2023
A wave of sites added 'User-agent: GPTBot / Disallow: /' to opt out of training. Fine. A smaller number added a wildcard block for anything with 'GPT' or 'AI' in the name, or blocked ChatGPT-User, and those sites are absent from ChatGPT's answers today. The crawler checker on this site reads your robots.txt and says which case you are.
The same pattern elsewhere
Google-Extended controls Gemini training and grounding, not Search or AI Overviews. PerplexityBot is the index; Perplexity-User is the live fetch. Decide about training separately from search, and name each agent.
The term behind it: AI visibility
How often AI answer engines (ChatGPT, Perplexity, Gemini, Google AI Overviews) name a company when a buyer asks who to consider in its category, and whether they cite its own pages when they do. Measured as a share of recorded answers, weighted by position in the list and by citation.
The first of the report's two scores, out of 100. Every buyer question is put to every engine; an answer that names the company scores by position (first named counts most) and by whether the company's own site was cited. The score is the weighted share across all recorded answers, with the engines that answered nothing left out of the denominator and named in the header. AI visibility, in full.
Read next
AI crawler access checker · AI visibility on ChatGPT · AI crawler
Ask it about your own company
Your website, region and work email. The score appears in about three minutes, and the report is a link you keep.