LLMs prefer hiring people with resumes written by that LLM

[ergophobe]

LLMs prefer their own writing on resumes to that of humans or other LLMs.

"The bias against human-written resumes is particularly substantial, with self-preference bias ranging from 67% to 82% across major commercial and open-source models."

https://arxiv.org/abs/2509.00462


Summary here
https://x.com/heynavtoor/status/2048088874686300431

Same person. Same resume. Same skills.

One version written by a human. One rewritten by GPT-4o.

GPT-4o picked its own version 97.6% of the time.

This matters a lot since more and more firms do an initial filter with AI. So if you know which model their HR department uses, you have a massive leg up.