What is LLM training data?
LLM training data is the text corpus a language model learns from — largely crawled web content — and it determines what the model 'knows' about your business when answering without live search.
How does your website end up in training data?
Through training crawlers — GPTBot, ClaudeBot, Google-Extended — and public archives like Common Crawl (collected by CCBot), which many labs train on. What they collected months or years ago shapes today's ungrounded answers; what they collect today shapes the next model generation. Training-data visibility is an investment with a long settlement date.
Should you block training crawlers?
It's the one genuinely two-sided crawler decision. Blocking keeps your content out of future models — a real right, rationally exercised by publishers whose content is their product. Allowing means future models learn your business exists, matters when customers ask them for recommendations, and costs nothing today. For businesses that want to be found, the visibility case usually wins; for content businesses, protection often does.
Can you get removed from training data retroactively?
Effectively no. Blocking training crawlers is forward-only — models already trained keep what they learned, and there is no general mechanism to unlearn a website from a shipped model. Vendor-specific removal processes exist but are slow and partial. Which cuts both ways: the visibility you build in training data is similarly durable, compounding quietly across model generations.
Frequently asked questions
What does LLM training data mean?
LLM training data is the text corpus a language model learns from — largely crawled web content — and it determines what the model 'knows' about your business when answering without live search.
If I block GPTBot today, does ChatGPT forget me?
No — models already trained retain what they learned, and blocking doesn't reach back. It stops your content entering future training runs, with effects that appear only when those future models ship.
Why does ChatGPT know outdated facts about my business?
Its memory is a snapshot from when its training data was collected. Ungrounded answers speak from that snapshot; only grounded answers (with live search) can see your current site. Fixing the record means both updating your site and being visible enough that grounded retrieval finds the update.
Is Common Crawl the same as Google's index?
No — Common Crawl is a nonprofit public web archive many AI labs train on, collected by CCBot. Google's index is proprietary and gathered by Googlebot. Blocking one has no effect on the other.