A cover letter ai prompt works when it constrains the letter harder than the human writer would. Five sentences, one measurable achievement, one detail only you know. Those three limits force the model to use what you supplied instead of filling space with the usual opening about a long-standing admiration for the company, and they produce a letter that takes under a minute to read and survives a recruiter who reads a hundred of them.
Below is the core prompt, then the two adjustments that turn a competent draft into one that sounds like a person wrote it.
The five-sentence cover letter ai prompt
Write a cover letter of exactly five sentences for the role of [job title] at [company name]. The job description is: [paste it]. My background is: [three or four facts drawn from your resume]. The single strongest thing I have done is: [achievement, with any number you have]. One detail only I would know: [the personal detail you supply, e.g. I have used your product every morning for two years]. Sentence one says why this role and this company, using something specific from the job description. Sentence two states the closest match between my background and the first requirement. Sentence three carries the measurable achievement, with the number or timeframe I gave you. Sentence four carries the personal detail in a way that sounds like an aside, not a boast. Sentence five asks for the next step and names what I would like to talk about. Do not open with a compliment about the company. Do not use the phrase "I am writing to apply". Do not use "passionate", "dynamic", "results-driven", or "team player". Do not invent a number, a project, or a connection to the company. If you want a fact I did not give you, write [CONFIRM DETAIL] instead. Then list each sentence with its word count.
Fill in these details
- Job description: the full posting, because sentence one is only specific if the prompt was.
- Background facts: from your resume, not new claims. Three or four is enough for five sentences.
- Measurable achievement: the one result a hiring manager would remember. A number, a timeframe, a volume, or a deadline you met.
- Personal detail: something the model cannot infer. Which product you use, what you built on a weekend, the problem that made you apply.
Asking for word counts per sentence is a small trick with a large effect. When a sentence runs long you can see it immediately, and the letter keeps the shape that makes it fast to read.
Add the detail no model can invent
Every cover letter draft from a prompt fails at the same place: it is accurate and forgettable. The sentence that makes a letter memorable is the one carrying a fact the model had no way of knowing, and that is the piece you must supply or leave out.
Adjustment prompt. Here is my five-sentence draft: [paste]. Here are three facts about me that are not on my resume: [list three specific, verifiable details]. Rewrite the draft so that one of those facts appears naturally inside sentence one or sentence four, and the other two appear nowhere. Keep all five sentences. Keep every number I gave you. Do not exaggerate any of the three facts. Do not make a detail sound more significant than it is. If a fact does not fit in five sentences, tell me which sentence is expendable.
The honest reason to run this second pass is that the first prompt, given only resume facts, will produce something that reads like every other letter from the same industry. Facts from outside the resume are what break the pattern.
When to write six sentences instead of five
Five is the default because it is the shortest letter that still carries an achievement and a reason. Six works when the role genuinely needs two achievements, which happens in senior and specialist applications where the letter is doing work a CV section cannot.
Rewrite my five-sentence draft as six sentences by splitting [achievement sentence] into the action and the result. Keep every other sentence unchanged and keep every number. Do not add a closing paragraph. Do not add a second compliment about the company.
Worked example: five sentences for an operations role
A candidate applies for an operations coordinator role and supplies a scheduling background, a measurable achievement, and one personal detail.
| Sentence | Job in the letter | Source |
|---|---|---|
| 1 | connects the role to a specific requirement in the posting | job description |
| 2 | names the closest background match | resume facts |
| 3 | carries the achievement with its number | supplied achievement |
| 4 | carries the personal detail as an aside | detail only the candidate knows |
| 5 | asks for the next step | fixed by the prompt |
Sentence four is where most drafts are weakest, and it is the sentence the model can only write once you supply the fact. Leave it bracketed and it will write the same safe filler every time.
Check the letter before you send it
1. Read it in under thirty seconds
Time yourself. If a sentence needs a second pass to understand, it is too long. This test catches the most common flaw in AI-assisted letters, which is not bad wording but slow reading.
2. Verify every claim against your own record
Check the achievement number, the dates, and the personal detail against what you can evidence. Anything the model softened or rounded during the rewrite has to be corrected before it becomes a statement about your work.
3. Cut any sentence that could appear in another applicant's letter
Be honest about which sentences are yours. Usually it is the fourth. If a sentence would fit a competitor's letter word for word, replace it or remove it.
Common cover letter prompt mistakes
- Asking for a full-page letter. Long prompts produce long letters. Set the sentence count and let the length follow.
- Letting the model write the compliment. Company praise is the generic sentence, and recruiters read hundreds of them.
- Supplying no achievement. With nothing measurable to include, the model invents one or hides the letter in adjectives.
- Adding a fabricated connection. Do not claim to have used a product or met someone unless you did.
- Running the letter before the resume is finished. Align the facts first, then draft the letter from the same set.
Frequently asked questions
Is five sentences too short for an academic or research cover letter?
Some fields expect a fuller statement of purpose, and academic hiring often reads longer letters. Keep the structure and add the extra material the field expects rather than padding five sentences out to a page.
Can a model write the personal detail for me?
It can draft one from what you tell it, and it can invent one if you ask, which is the problem. Supply a real detail or leave the sentence short. An invented personal detail is the kind of claim an interviewer will notice.
Should the cover letter repeat the resume?
No. The resume lists what you have done and the letter argues why it is relevant here. One achievement stated properly in five sentences beats a summary of everything in a paragraph.
Draft one letter tonight with the five-sentence limit
Paste a real posting and your real facts into the core prompt, then run the adjustment prompt with the details that never made it onto the resume. Read the result out loud at a normal speaking pace. For more templates built around the same discipline, browse the cover letter prompt collection.