Published on 2025-08-07T06:18:08Z

GPTBot

GPTBot is the official web crawler for OpenAI, the company behind ChatGPT. Its purpose is to scan the public web to collect a diverse range of text data to be used for training and improving OpenAI's large language models (LLMs). Website owners who do not wish for their content to be used for AI training can opt out by blocking this bot in their robots.txt file.

What is GPTBot?

GPTBot is a web crawler operated by OpenAI, the creator of ChatGPT. It functions as an AI data scraper, systematically browsing the internet to collect publicly available web content. This data is then used to train and improve OpenAI's large language models (LLMs). The bot identifies itself in server logs with the user-agent string GPTBot. This transparency allows website owners to recognize its activity and manage its access to their content.

Why is GPTBot crawling my site?

GPTBot is visiting your website to gather information that can be used to train OpenAI's AI models. It is particularly interested in high-quality, informative content that can help the models learn about a wide variety of topics and understand language patterns. The frequency of its visits depends on how often your content is updated and its perceived value for AI training. This crawling is considered authorized for public content, but OpenAI provides a clear opt-out mechanism for those who do not wish to contribute their data.

What is the purpose of GPTBot?

The primary purpose of GPTBot is to collect training data for OpenAI's language models. This data helps ensure that AI systems like ChatGPT have access to a broad range of information, allowing them to generate more accurate and helpful responses. For website owners, the activity provides an indirect benefit by contributing to the improvement of AI systems used by millions. However, it also raises concerns for some content creators regarding attribution and the commercial use of AI systems trained on their work.

How do I block GPTBot?

If you do not want your website's content to be used to train OpenAI's models, you can block GPTBot by adding a specific disallow rule to your robots.txt file. This is the official and respected method for opting out.

To block GPTBot, add the following lines to your robots.txt file:

User-agent: GPTBot
Disallow: /

How to verify the authenticity of the user-agent operated by OpenAI?

Reverse IP lookup technique

To verify user-agent authenticity, you can use host linux command two times with the IP address of the requester.
  1. > host IPAddressOfRequest
    This command returns the reverse lookup hostname (e.g., 4.4.8.8.in-addr.arpa.).
  2. > host ReverseDNSFromTheOutputOfFirstRequest
If the output matches the original IP address and the domain is associated with a trusted operator (e.g., OpenAI), the user-agent can be considered legitimate.

IP list lookup technique

Some operators provide a public list of IP addresses used by their crawlers. This list can be cross-referenced to verify a user-agent's authenticity. However, both operators and website owners may find it challenging to maintain an up-to-date list, so use this method with caution and in conjunction with other verification techniques.