User-Agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.2; +https://openai.com/gptbot)

first seen 2026-08-25 18:00 · last seen 2026-09-14 05:18 · JSON

Decomposed attributes

Browser / clientGPTBot 1.2
Device classbot
Declared URLhttps://openai.com/gptbot
Noteinferred from the self-declared string — a claim, not a measurement; compare with the wire fingerprints above

Co-observed signals

Signals from other families seen in the same observation. A fingerprint spread thinly across many lower-layer signatures is a classic inconsistency signal.

TLS ClientHello (JA4)

fingerprintco-occurrences
t13d131200_f57a46bbacb6_9249cab70c778
t13d131300_f57a46bbacb6_1bd98dace7751

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr05enus_f3bb7aa45ec4_000000000000_0000000000008
ge11nn05enus_f3bb7aa45ec4_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:58+6:0:1420:mss*30,9:mss,sok,ts,nop,ws:df,id+:08
4:55+9:0:1420:mss*30,9:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
42600_2-4-8-1-3_1420_99

Country

fingerprintco-occurrences
US · United States3
BE · Belgium2
TW · Taiwan2
JP · Japan1
SG · Singapore1

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC9