Can employers tell if you used ChatGPT? Victor reads your letter

The job posting sits open in one tab; the cover letter came together in the other, in seconds. Reread, it seems fine and interchangeable, and you wonder if the recruiter can tell. After two readings by Victor and one rewrite, your letter no longer needs to read like everyone else’s.

Natalie writes a first letter

In the Nation AI chat, the candidate gives Natalie the essentials: a junior sales associate job at a sporting goods store, one summer as a bakery cashier, plus six years of basketball at the local club. In return, a complete letter.

A correct letter, fast, ready to copy.

Nation AI also has a guide to writing a cover letter with ChatGPT’s help, from the first prompt to the finished draft.

Victor reads it before the recruiter does

The candidate pastes the letter into Victor’s chat: could it pass for the work of an AI?

No percentage: Victor gives a style level. He notes the polish first: “The letter is very concise and evenly structured, moving neatly from experience to interest to thanks.” Then he sets the limit: “This is only a stylistic impression, not proof of how the letter was written.”

He points at the stock phrases: “Phrases like ‘bring my customer-service experience’ and ‘how I could contribute to your team’ are common application language and could fit many candidates.”

His advice: “To make it feel more personal, you could add one concrete example of how you helped a customer or connect your basketball experience to a relevant skill, if that reflects your experience.”

Your own letter can go through Nation AI’s free AI text detector, with no sign-up.

Can recruiters tell if you used ChatGPT?

The UCLA Career Center devotes a page to generative AI in the job search: lean on it too hard, the center warns, and your applications “appear generic and impersonal,” because AI “doesn’t know your story.” At UC Berkeley, Career Engagement says the same: the most effective use of these tools “starts with your own, original content,” which you then tailor to “the specific skills and experiences for each job description.”

The figures come from a May 2025 survey that TopResume, a resume-writing service, ran among 600 US hiring managers:

Customization also shows up in the economics: a working paper by Galdin and Silbert, posted on arXiv in November 2025, uses data from a freelance platform to show that employers put a premium on customized applications before LLMs, and stopped once the models arrived.

Natalie tries again, more personal

The candidate asks Natalie for a less generic version, with the same two details. The new sample letter changes voice:

Victor reads this second version. Its level drops a notch: “AI-style indicator: Low.” What works: “The motivation is specific: ‘helping people find the right gear for a sport I know firsthand’ connects the role to your basketball experience.”

His verdict keeps one caution: “This version feels more personal and natural than the previous one, though a few phrases remain fairly standard for a cover letter.” And he credits the details: “The work experience is concrete: the bakery cashier role and busy periods add believable context without overexplaining.”

The level moved with the words, not with the facts: the bakery summer and the six years of basketball never changed.

Make the letter yours before you send it

Victor’s four checks before you send:

• A genuine reason for wanting this particular role or workplace, not just “I’m excited to apply.”
• A concrete example of what you did or learned, rather than a broad claim like “I have strong communication skills.”
• A clear connection between your experience and the job.
• Details that are true to you, without adding personal anecdotes just to sound distinctive.

Victor’s last word: “Don’t invent details just to make it sound more human.”

Your resume may be AI-assisted too: our article on the resume made with AI details what counts then.

What about applicant tracking systems?

Your resume is weighed with the same caution as the letter: the figures above count resumes and cover letters together, and neither career center separates the two. The difference sits in the software in between.

Greenhouse, one of the major applicant tracking systems, uses its support pages to list the files its software cannot read: resumes larger than 2.5MB, resumes uploaded as images, and layouts built on tables and headers. Those are parsing problems; none of those pages mentions spotting AI-written text.

Common questions