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How to Write a Cover Letter with Mistral

Writing a convincing cover letter is a delicate exercise that requires time and thought. With Mistral, the leading French AI, you can speed up this process while producing a professional and personalized text. In this tutorial, we guide you step by step to use Mistral to create a striking cover letter, adapted to the targeted position and your background. You will learn how to formulate the right prompts, structure your letter according to the codes expected by French recruiters, and refine the result so it authentically reflects your profile. Whether you are job hunting, changing careers, or a recent graduate, this guide will help you make the most of AI to land an interview.

Prerequisites

  • 1.Have an account on chat.mistral.ai or access to the Mistral API
  • 2.Have the targeted job offer (job description, required skills)
  • 3.Have your updated CV or a list of your key experiences and skills
  • 4.Know the company name and ideally information about its culture

Steps

1

Prepare the key information to provide to Mistral

Before calling on Mistral, gather all the necessary information: the job title, the company name, the skills required in the ad, your relevant experiences, your degrees, and your genuine motivations for this position. The more context you provide to the AI, the more personalized and convincing the result. Also copy the text of the job offer so you can paste it directly into your prompt.

Tip: Highlight in the job offer the 3 to 5 key skills required. These are what your letter must absolutely address.
2

Write a structured first prompt to generate the letter

Formulate a detailed prompt that gives Mistral all the context needed to produce a quality cover letter. Specify the desired tone, length, format, and elements to highlight. A well-constructed prompt makes all the difference between a generic result and a truly personalized letter.

Write a professional cover letter in French for the position of [JOB_TITLE] at [COMPANY_NAME]. Here is the job offer: [paste the ad]. Here is my background: [summarize your key experiences, degrees, and skills]. The letter should be about 300 words, structured in 4 paragraphs (hook, background and skills, motivation for the company, conclusion with a call to action), and adopt a professional yet authentic tone. Do not start with 'I take the liberty of writing to you.'

Tip: Explicitly ask Mistral to avoid cliché phrases like "Your company leader in its market" or "I take the liberty of submitting my application."
3

Analyze and refine the first result

Read the letter generated by Mistral carefully. Identify passages that are too generic, inaccurate information, or wording that doesn't sound like you. Then use a follow-up prompt to request targeted corrections. The goal is to iterate until you get a text that feels natural and personal.

Rephrase the second paragraph by highlighting my experience in [SPECIFIC_EXPERIENCE] more and creating a direct link with the skill [SKILL_REQUIRED_IN_THE_OFFER]. Make the tone slightly more dynamic and replace generic phrasing with concrete examples.

Tip: Proceed paragraph by paragraph rather than asking for a complete rewrite. This way you keep control over each part of the letter.
4

Personalize the paragraph about the company

The paragraph about your motivation for the company is often the weakest when generated by AI, because it lacks specific research. Provide Mistral with precise information about the company (recent news, values, projects) so it produces a truly personalized paragraph that shows the recruiter you have done your research.

Rewrite the paragraph about my motivation for the company by integrating these specific elements: [cite a recent company news, a project that interests you, or a company value that resonates with your background]. The paragraph should show that I know the company and explain why these elements motivate me personally.

Tip: Check the company's website, its LinkedIn, and recent news before this step. One precise detail is worth more than three generalities.
5

Check, humanize, and finalize the letter

Last crucial step: ask Mistral to check overall coherence, then read the letter aloud yourself to spot artificial turns of phrase. Add a personal touch—an anecdote, a conviction, a detail that is uniquely yours. This is what will transform a good AI-generated letter into an excellent letter that is truly yours.

Proofread this cover letter and check: 1) coherence between paragraphs, 2) absence of repetitions, 3) that the tone remains natural and human, 4) that the letter is indeed about 300 words. Propose a final corrected version and indicate the changes made.

Tip: Read the letter aloud: if a sentence sounds artificial when spoken, rephrase it in your own words. The recruiter should find your voice during the interview.

Common mistakes to avoid

  • ✗Copy-pasting the generated letter without personalizing or proofreading it, resulting in a generic outcome detectable by recruiters
  • ✗Not providing enough context in the prompt (forgetting to mention your experiences, the job offer, or the company name)
  • ✗Leaving in cliché phrases generated by AI like "with my X years of experience" or "your company recognized for its excellence"
  • ✗Using the same generated letter for multiple applications without adapting it to the target position and company
  • ✗Neglecting final formatting: forgetting contact details, date, subject line, or appropriate closing salutation

FAQ

Do recruiters detect cover letters written with AI?
Experienced recruiters can spot an AI-generated letter if it hasn't been personalized: overly smooth wording, lack of concrete details, impersonal tone. That's why the refinement and humanization steps are essential. By adding your own examples, anecdotes, and adapting the tone, the letter becomes undetectable and, more importantly, more effective.
Which Mistral model should I choose to write my cover letter?
For a cover letter in French, choose Mistral Large or Mistral Medium, which offer the best writing quality. The free model on chat.mistral.ai (Mistral Small) already gives very good results for this use. If you use the API, Mistral Large will produce the most natural and nuanced phrasing.
How long does it take to write a cover letter with Mistral?
Allow about 20 to 30 minutes for a well-personalized letter: 5 minutes to gather your information, 5 minutes for the first prompt, and 10 to 20 minutes for iterations and personalization. This is significantly faster than starting from a blank page, while achieving a professional-quality result.
Can I use Mistral to write letters in languages other than French?
Yes, Mistral handles English, Spanish, German, and Italian very well, among others. Simply specify the desired language in your prompt. For international positions, you can even ask Mistral to translate your French letter while adapting it to the conventions of the target country (format, tone, expected length).

Related tutorials

How to Write a CV with MistralHow to Prepare for a Job Interview with MistralHow to Write a Cover Letter with ChatGPT

How to use this prompt

  1. Copy the prompt with the button above.
  2. Paste it into ChatGPT, Claude or your favorite AI assistant.
  3. Replace the bracketed variables with your details, then refine the result.

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