User-Agent

Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.3; +https://openai.com/gptbot)

first seen 2026-07-03 10:44 · last seen 2026-09-13 10:37 · JSON

Decomposed attributes

Browser / clientGPTBot 1.3
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
t13d1011h1_61a7ad8aa9b6_3a8073edd8ef21
t13d1516h2_8daaf6152771_d8a2da3f94cd Match?Exact match in Thumbprint's published controlled catalog captures: chromium 149.0.7827.102, chrome 149.0.7827.102, chrome 149.0.7827.156, +25 more.The fingerprint page shows the full measured match list. More on the catalog.4
t13d131000_f57a46bbacb6_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.23.12.The fingerprint page shows the full measured match list. More on the catalog.3
t13d141000_cbb2034c60b8_e7c285222651 Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.22.12.The fingerprint page shows the full measured match list. More on the catalog.1
t13d131300_f57a46bbacb6_1bd98dace7751

HTTP request (JA4H)

fingerprintco-occurrences
ge11nr040000_8b1ed2202073_000000000000_00000000000011
ge11nn040000_8b1ed2202073_000000000000_00000000000010
ge11nr030000_cd680697de12_000000000000_0000000000002
ge11nn030000_cd680697de12_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.5, powershell 7.6.4, +11 more.The fingerprint page shows the full measured match list. More on the catalog.2
ge20nn050000_857b5fa3405d_000000000000_0000000000002
ge20nn020000_fb4f949fd323_000000000000_000000000000 Match?Exact match in Thumbprint's published controlled catalog captures: powershell 7.6.6, powershell 7.6.9, powershell 7.6.8.The fingerprint page shows the full measured match list. More on the catalog.1
ge11nr05enus_f3bb7aa45ec4_000000000000_0000000000001
ge20nn050000_277e78b0d503_000000000000_0000000000001

HTTP/2 frames (Akamai)

fingerprintco-occurrences
2:0;4:4194304;5:16384;6:262144;1:65536|1073741824|0|a,m,p,s3
2:0;4:4194304;5:16384;6:10485760|1073741824|0|a,m,p,s Match?Exact match in Thumbprint's published controlled catalog captures: go-net/http 1.26.6, go-net/http 1.26.10, go-net/http 1.26.9, +8 more.The fingerprint page shows the full measured match list. More on the catalog.1

TCP SYN (p0f)

fingerprintco-occurrences
4:54+10:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:06
4:48+16:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:05
4:58+6:0:1420:mss*46,10:mss,sok,ts,nop,ws:df,id+:04
4:51+13:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:03
4:54+10:0:1460:mss*29,10:mss,sok,ts,nop,ws:df,id+:03
4:47+17:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:02
4:52+12:0:1460:mss*29,10:mss,sok,ts,nop,ws:df,id+:02
4:57+7:0:1436:mss*45,7:mss,sok,ts,nop,ws:df,id+:02
4:52+12:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01
4:55+9:0:1460:mss*44,7:mss,sok,ts,nop,ws:df,id+:01

TCP SYN (JA4T)

fingerprintco-occurrences
64240_2-4-8-1-3_1460_718
42340_2-4-8-1-3_1460_105
65320_2-4-8-1-3_1420_104
64620_2-4-8-1-3_1436_72
42600_2-4-8-1-3_1420_91

Country

fingerprintco-occurrences
US · United States19
NL · Netherlands9
CH · Switzerland2

Network (ASN)

fingerprintco-occurrences
AS41608 · NextGenWebs, S.L.8
AS36352 · HostPapa6
AS396982 · Google LLC5
AS399804 · Hostodo5
AS53667 · FranTech Solutions2
AS400529 · Infraly, LLC2
AS14061 · DigitalOcean, LLC1
AS46475 · Limestone Networks, Inc.1