LLMs tend to prefer their own writing in resumes (self-preference bias)

Why bother with the hiring process at all anymore, it seems. May as well just pick names out of a hat.

I work as a software developer and have had to hire for several positions in the last couple years. The process was not easy before AI, and now it's even harder to find candidates that will even TALK to you—person to person (over web video chat)—without filtering every question through an AI "coach". I want to see if you're going to be a good human to work wirh, not that you can read from a teleprompter. Not to mention the obvious cheating when it comes to the code part of the interview process. If you can't write a basic couple of classes and functions, why would I let you set an LLM loose on the codebase?

Guess that's a bit of a tangiental rant.

Here's a link to the original study: https://arxiv.org/abs/2509.00462