User-Agent

Mozilla/5.0 (compatible; ChatGPT-User/1.0; +https://openai.com/bot)

first seen 2026-08-25 18:00 · last seen 2026-09-15 20:46 · JSON

Decomposed attributes

Browser / clientChatGPT-User 1.0
Device classbot
Declared URLhttps://openai.com/bot
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_9249cab70c7716
t13d131300_f57a46bbacb6_1bd98dace7752

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr05enus_f3bb7aa45ec4_000000000000_00000000000011
ge11nn05enus_f3bb7aa45ec4_000000000000_0000000000004
ge11nr040000_e1d2031bdfea_000000000000_0000000000001
ge11nr060000_6f1c3d56a901_000000000000_0000000000001
po11nr090000_0c3f6181eb51_000000000000_0000000000001

TCP SYN (p0f)

fingerprintco-occurrences
4:58+6:0:1420:mss*30,9:mss,sok,ts,nop,ws:df,id+:017
4:51+13:0:1420:mss*30,9:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
42600_2-4-8-1-3_1420_918

Country

fingerprintco-occurrences
US · United States7
BE · Belgium6
TW · Taiwan2
NL · Netherlands1
JP · Japan1
SG · Singapore1

Network (ASN)

fingerprintco-occurrences
AS396982 · Google LLC18