# LLM-Assisted Proofreading

> Source: <https://forum.effectivealtruism.org/posts/XAyBcxNrq9A9PENcw/llm-assisted-proofreading-a-study-of-the-effectiveness-of-13>
> Published: 2026-07-24 10:11:04+00:00

A short one today.

I applied to a fellowship last year, used an LLM to check my punctuation - wrote the disclaimer prominently as required - and later discovered the same text scored between 40% and 100% AI-generated on free detection tools.

I didn’t let it go. When have I ever?

So, I tested 13 free AI detection tools on seven human-written texts at four levels of LLM-assisted proofreading from three LLMs (wiping sweat of forehead).

The result: a published paper [SSRN](https://papers.ssrn.com/sol3/papers.cfm?abstract_id=7073158). It says what I suspected but needed to prove.

Read it and let me know what you think.