I prompted ChatGPT, Claude, Perplexity, and Gemini and watched my Nginx logs

Interesting methodology. I've been running Claude Sonnet in production content workflows for 6 months and the pattern I notice most is that every model hits URLs in the prompt at slightly different priorities.. Claude tends to fetch top-of-message URLs first, while GPT often fetches the last one mentioned. Has anyone else seen ordering bias in which URLs get requested when multiple are in the same prompt? Would make a nice follow-up experiment if your logs have that granularity.

Gah, the writing on this is so painful to read, it feels like this was most likely written by an LLM.

The writing style is so unclear, it's hard to figure out one of the key points: it mentions that Gemini doesn't use a distinct user-agent for its grounding. It doesn't mention whether it actually hit the endpoint during the test, though it kind of implies that with "Silence from Google is not evidence of no fetch." Uh, if there are no requests coming in live, that means no fetch, it's using a cache of your site.

It makes a difference whether it fetches a page live, or whether it's using a cached copy from a previous crawl; that tells you something about how up-to-date answers are going to be from people asking questions about your website from Gemini. But I guess the LLM writing this article just wanted to make things sound punchy an impressive, not actually communicate useful information.

Anyhow, LLM marketing spam from an LLM marketing spam company. Bleh.

So the state of AI in 2026: ChatGPT DDoS-lite, Claude the polite one that actually reads the rules, Perplexity maybe shows up, and Google was already in your house.

Does smack of AI ness

The IPs listed in the output are from reserved ranges as well, like they were intentionally obfuscated (but this was not shared with the reader).

It’s the kind of obfuscation that AI would do (using esoteric bogon ranges as well)

https://ipinfo.io/ips/203.0.113.0/24

I’m curious about the header of their requests. Something like any one of them is using text/markdown accept header?

You're not burning money?

Looks like a very fun exercise, I will try it out as well, thanks for the idea!

So for the user-agent "ChatGPT-User" I can return my prompt injection text. Got it.