{
  "entity_a": {
    "slug": "chatgpt-user",
    "name": "ChatGPT-User"
  },
  "entity_b": {
    "slug": "gptbot",
    "name": "GPTBot"
  },
  "fields_documented": 10,
  "claims": 17,
  "last_verified": "2026-09-13",
  "fields": [
    {
      "field": "cites_sources",
      "value_a": "not_documented",
      "value_b": null,
      "claim_id_a": 25,
      "claim_id_b": null,
      "same": false
    },
    {
      "field": "honours_crawl_delay",
      "value_a": "not_documented",
      "value_b": "not_documented",
      "claim_id_a": 20,
      "claim_id_b": 79,
      "same": true
    },
    {
      "field": "publishes_ip_list",
      "value_a": "yes",
      "value_b": "yes",
      "claim_id_a": 21,
      "claim_id_b": 80,
      "same": true
    },
    {
      "field": "purpose_documented",
      "value_a": "user_fetch",
      "value_b": "training",
      "claim_id_a": 23,
      "claim_id_b": 82,
      "same": false
    },
    {
      "field": "reads_llms_txt",
      "value_a": "not_documented",
      "value_b": null,
      "claim_id_a": 26,
      "claim_id_b": null,
      "same": false
    },
    {
      "field": "respects_robots_txt",
      "value_a": "partial",
      "value_b": "yes",
      "claim_id_a": 19,
      "claim_id_b": 78,
      "same": false
    },
    {
      "field": "robots_txt_fetch_marker",
      "value_a": null,
      "value_b": "yes",
      "claim_id_a": null,
      "claim_id_b": 85,
      "same": false
    },
    {
      "field": "separate_search_and_training_tokens",
      "value_a": "not_documented",
      "value_b": "yes",
      "claim_id_a": 24,
      "claim_id_b": 83,
      "same": false
    },
    {
      "field": "user_agent_string_full",
      "value_a": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot",
      "value_b": "Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; GPTBot/1.4; +https://openai.com/gptbot",
      "claim_id_a": 27,
      "claim_id_b": 84,
      "same": false
    },
    {
      "field": "verifiable_by_rdns",
      "value_a": "not_documented",
      "value_b": "not_documented",
      "claim_id_a": 22,
      "claim_id_b": 81,
      "same": true
    }
  ],
  "differences": [
    {
      "field": "cites_sources",
      "statement_a": "OpenAI does not publish whether ChatGPT responses cite pages fetched by ChatGPT-User.",
      "statement_b": null,
      "claim_id_a": 25,
      "claim_id_b": null
    },
    {
      "field": "purpose_documented",
      "statement_a": "ChatGPT-User visits web pages for user actions in ChatGPT and in Custom GPTs.",
      "statement_b": "GPTBot crawls content that may be used to train OpenAI generative AI foundation models.",
      "claim_id_a": 23,
      "claim_id_b": 82
    },
    {
      "field": "reads_llms_txt",
      "statement_a": "OpenAI does not publish whether ChatGPT-User reads llms.txt files.",
      "statement_b": null,
      "claim_id_a": 26,
      "claim_id_b": null
    },
    {
      "field": "respects_robots_txt",
      "statement_a": "ChatGPT-User fetches pages in response to user actions in ChatGPT, and OpenAI states that robots.txt rules may not apply to ChatGPT-User fetches.",
      "statement_b": "GPTBot honours robots.txt rules that webmasters set for the GPTBot token.",
      "claim_id_a": 19,
      "claim_id_b": 78
    },
    {
      "field": "robots_txt_fetch_marker",
      "statement_a": null,
      "statement_b": "OpenAI may add a robots.txt marker to the GPTBot user agent string when GPTBot fetches robots.txt files.",
      "claim_id_a": null,
      "claim_id_b": 85
    },
    {
      "field": "separate_search_and_training_tokens",
      "statement_a": "OpenAI does not document ChatGPT-User as a search or training opt-out token.",
      "statement_b": "OpenAI separates search and training controls into two robots.txt tokens: OAI-SearchBot for search and GPTBot for training.",
      "claim_id_a": 24,
      "claim_id_b": 83
    },
    {
      "field": "user_agent_string_full",
      "statement_a": "ChatGPT-User sends the user agent string Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; ChatGPT-User/1.0; +https://openai.com/bot.",
      "statement_b": "GPTBot sends the user agent string Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko); compatible; GPTBot/1.4; +https://openai.com/gptbot.",
      "claim_id_a": 27,
      "claim_id_b": 84
    }
  ],
  "sources": [
    "https://developers.openai.com/api/docs/bots",
    "https://openai.com/chatgpt-user.json",
    "https://openai.com/gptbot.json"
  ]
}