User-Agent

Mozilla/5.0 (Linux; Android 14; Pixel 8) AppleWebKit/537.36 (KHTML, like Gecko; compatible; GPTBot/1.2; +https://openai.com/gptbot) Chrome/147.0.5256.18 Mobile Safari/537.36

first seen 2026-09-05 18:21 · last seen 2026-09-05 18:21 · JSON

Bot verification

This User-Agent declares a bot or user-triggered fetcher. Each connection's IP is checked at ingest against the verification channels the operator publishes — its crawler IP ranges and, where documented, forward-confirmed reverse DNS. A claim either channel confirms is verified; one confirmed by neither — outside the ranges, inside a different operator's, or failing the DNS check — is unverified. Meta publishes its network rather than crawler ranges, so its verified claims are network-confirmed and its unconfirmed misses are unverified claims, not proven spoofs. Telegram publishes network ranges rather than fetcher ranges, and its misses are treated the same way. bot-claim anomalies →

claims	verified	unverified	unverified rate
GPTBot	0	1	100.0%

Decomposed attributes

Browser / client	`GPTBot 1.2`
Operating system	`Android 14`
Device class	`bot`
Declared URL	`https://openai.com/gptbot Chrome/147.0.5256.18 Mobile Safari/537.36`
Note	`inferred 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)

fingerprint	co-occurrences
`t13d131200_f57a46bbacb6_9249cab70c77`	1

HTTP request (JA4H)

fingerprint	co-occurrences
`ge11nr05enus_f3bb7aa45ec4_000000000000_000000000000`	1

TCP SYN (p0f)

fingerprint	co-occurrences
`4:50+14:0:1420:mss*30,9:mss,sok,ts,nop,ws:df,id+:0`	1

TCP SYN (JA4T)

fingerprint	co-occurrences
`42600_2-4-8-1-3_1420_9`	1

Country

fingerprint	co-occurrences
`TW` · Taiwan	1

Network (ASN)

fingerprint	co-occurrences
`AS396982` · Google LLC	1