{
  "entity_a": {
    "slug": "chatgpt-user",
    "name": "ChatGPT-User"
  },
  "entity_b": {
    "slug": "perplexity-user",
    "name": "Perplexity-User"
  },
  "fields_documented": 9,
  "claims": 18,
  "last_verified": "2026-09-13",
  "fields": [
    {
      "field": "cites_sources",
      "value_a": "not_documented",
      "value_b": "yes",
      "claim_id_a": 25,
      "claim_id_b": 109,
      "same": false
    },
    {
      "field": "honours_crawl_delay",
      "value_a": "not_documented",
      "value_b": "not_documented",
      "claim_id_a": 20,
      "claim_id_b": 104,
      "same": true
    },
    {
      "field": "publishes_ip_list",
      "value_a": "yes",
      "value_b": "yes",
      "claim_id_a": 21,
      "claim_id_b": 105,
      "same": true
    },
    {
      "field": "purpose_documented",
      "value_a": "user_fetch",
      "value_b": "user_fetch",
      "claim_id_a": 23,
      "claim_id_b": 107,
      "same": true
    },
    {
      "field": "reads_llms_txt",
      "value_a": "not_documented",
      "value_b": "not_documented",
      "claim_id_a": 26,
      "claim_id_b": 110,
      "same": true
    },
    {
      "field": "respects_robots_txt",
      "value_a": "partial",
      "value_b": "no",
      "claim_id_a": 19,
      "claim_id_b": 103,
      "same": false
    },
    {
      "field": "separate_search_and_training_tokens",
      "value_a": "not_documented",
      "value_b": "not_documented",
      "claim_id_a": 24,
      "claim_id_b": 108,
      "same": true
    },
    {
      "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; Perplexity-User/1.0; +https://perplexity.ai/perplexity-user)",
      "claim_id_a": 27,
      "claim_id_b": 111,
      "same": false
    },
    {
      "field": "verifiable_by_rdns",
      "value_a": "not_documented",
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      "claim_id_a": 22,
      "claim_id_b": 106,
      "same": true
    }
  ],
  "differences": [
    {
      "field": "cites_sources",
      "statement_a": "OpenAI does not publish whether ChatGPT responses cite pages fetched by ChatGPT-User.",
      "statement_b": "Perplexity includes a link to each page that Perplexity-User visits in the Perplexity response.",
      "claim_id_a": 25,
      "claim_id_b": 109
    },
    {
      "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": "Perplexity-User ignores robots.txt rules because a user requests each Perplexity-User fetch.",
      "claim_id_a": 19,
      "claim_id_b": 103
    },
    {
      "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": "Perplexity-User sends the user agent string Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; Perplexity-User/1.0; +https://perplexity.ai/perplexity-user).",
      "claim_id_a": 27,
      "claim_id_b": 111
    }
  ],
  "sources": [
    "https://developers.openai.com/api/docs/bots",
    "https://docs.perplexity.ai/docs/resources/perplexity-crawlers",
    "https://openai.com/chatgpt-user.json",
    "https://www.perplexity.ai/perplexity-user.json"
  ]
}