Resume Tips
Using AI to Write Your Resume: ChatGPT vs Claude (What Actually Works)
Everyone is using AI for their resume now. Some candidates get much better results than others. Others are sending out polished-looking documents full of generic corporate language that hiring managers recognize immediately.
The difference is not which AI tool you use — it's knowing what AI is actually good at, what it gets wrong, and how to use it as a collaborator rather than a ghostwriter. This guide gives you an honest assessment of both ChatGPT and Claude for resume work, with the specific prompts that produce good output.
What AI Is Actually Good At for Resumes
Used correctly, AI delivers real improvements in specific resume tasks:
- Rewriting weak bullet points. Give AI a vague bullet and your real accomplishment, and it will produce a tighter, more impactful version. This is where AI saves the most time and delivers the clearest value.
- Generating summary options. AI can produce several different professional summary drafts very quickly. You pick the one that sounds most like you, then edit. This is much faster than staring at a blank page.
- Tailoring to a job description. When you provide both your resume and a job posting, AI can identify missing keywords and suggest how to incorporate them naturally. This is directly useful for ATS optimization.
- Cover letter drafts. AI produces solid first-draft cover letters quickly. They almost always need editing for tone and specificity, but starting from a structured draft is faster than writing from scratch.
- Identifying vague language. Ask AI to flag every bullet that doesn't include a specific metric or outcome. It's an efficient way to find the weakest parts of your resume.
What AI Gets Wrong
This section matters as much as the one above. AI has consistent failure modes on resumes that can quietly undermine your application:
- Hallucinated metrics. If you ask AI to "improve" a bullet without giving it real numbers, it will sometimes invent them — "increased revenue by 34%," "managed a team of 12." These numbers are fabrications. Never use any metric that AI generated unless you verify it against your actual record.
- Generic corporate language. AI defaults to phrases like "spearheaded initiatives," "leveraged cross-functional synergies," "results-driven professional," and "dynamic team player." These phrases have been so overused that recruiters read right past them. Edit them out aggressively.
- Over-claiming. AI tends to inflate the scope and importance of your contributions. "Assisted with" becomes "led." "Contributed to" becomes "drove." Read every AI-generated line against what you can honestly defend in an interview.
- Losing your voice. A resume is a marketing document, but it still needs to sound like a real person. AI output often reads as processed — technically correct but somehow flat. Editing AI drafts back toward your natural phrasing is an important step.
- Not knowing your actual work. AI can only work with what you give it. It cannot know that your "customer success" role actually involved building a $2M renewal book from scratch, or that your "data analyst" title belied a team leadership role. The more specific context you provide upfront, the better the output.
The fundamental rule: AI improves how you express your accomplishments. It cannot create accomplishments you don't have. Every fact, number, and claim in your resume must be something you can verify and defend.
ChatGPT for Resume Writing
ChatGPT (specifically GPT-4o, the current default model) is fast, confident, and handles structured tasks well. For resume work, its strengths and weaknesses are:
ChatGPT Strengths
- Fast output — good for generating multiple options quickly
- Strong at following formatting instructions
- Handles long inputs (pasting full resume + JD) reliably
- Good at structural rewrites and reorganizing sections
- Confident tone — output reads as polished immediately
ChatGPT Weaknesses
- Defaults to corporate buzzword language without strong prompting
- Will invent metrics if you don't constrain it explicitly
- Less likely to push back when instructions are ambiguous
- Output can feel generic without significant editing
- Less nuanced about tone calibration across different fields
A prompt that works with ChatGPT
Rewrite this resume bullet to be more impactful. Use only the facts I provide — do not invent any numbers or achievements I haven't mentioned. Lead with a strong action verb. Keep it to one line. My bullet: "Responsible for managing the company's social media accounts." Additional facts: I managed Instagram, LinkedIn, and Twitter. Follower count grew from 1,200 to 4,800 during my time there (18 months). I created a content calendar and posted 5 times per week. Engagement rate went from 1.2% to 3.7%.
The key elements: telling it not to invent numbers, giving it all the real numbers, specifying the format (one line, action verb). Without these constraints, you'll get something like "Spearheaded comprehensive social media strategy across multiple platforms, achieving significant audience growth" — which says nothing.
Claude for Resume Writing
Claude (Anthropic's model) handles nuanced instructions well and tends to be more forthcoming about uncertainty. For resume work:
Claude Strengths
- Follows complex, multi-part instructions more precisely
- Better at matching a specific tone or voice when instructed
- More likely to flag if it's uncertain rather than hallucinate
- Nuanced understanding of context across different career levels
- Good at explaining its choices so you can evaluate the output
Claude Weaknesses
- Can be overly cautious — may hedge when you want direct output
- Sometimes produces longer explanations than needed
- Also susceptible to corporate language without explicit constraints
- Quality varies between Claude versions (use the latest model)
- May ask clarifying questions when you want it to just write
A prompt that works with Claude
I'm going to give you my current resume summary and a job description. Your task: rewrite my summary to better match the job description's language and priorities. Rules: only use facts from my current summary — don't add claims I didn't make. Incorporate 2-3 keywords from the JD naturally. Keep it to 3 sentences maximum. Do not use the words "dynamic," "passionate," "results-driven," or "spearheaded." My current summary: [paste your summary] Job description: [paste the JD]
The Prompts That Actually Work
Prompt quality determines output quality far more than which model you use. These four prompts are copy-paste ready for the most common resume AI tasks:
1. Rewrite a weak bullet with real numbers
Rewrite this resume bullet using only the facts listed below. Do not invent any numbers. Lead with a strong action verb. One sentence, maximum 20 words. Bullet to improve: [paste bullet] Real facts to draw from: [list your actual metrics and specifics]
2. Find missing keywords from a job description
Here is my resume and a job description. List every important keyword or skill phrase from the job description that does not appear in my resume. Then suggest where each missing keyword could be added naturally, based only on experience I've actually described. Resume: [paste resume] Job description: [paste JD]
3. Write a career change summary
Write a 3-sentence professional summary for someone transitioning from [old field] to [new field]. Use only the background facts below. Sentence 1: briefly frame the background. Sentence 2: highlight the most transferable skill or achievement. Sentence 3: state the target role type. Do not use the words "passionate," "dynamic," or "leverage." Background facts: [list your real experience, skills, certifications relevant to new field] Target role: [specific job title]
4. Draft a cover letter opening paragraph
Write the opening paragraph of a cover letter for this job application. It should be 3–4 sentences. Do not start with "I am writing to apply for." Reference something specific about the company or role. Connect it to one specific thing from my background below. Company/role: [company name, job title] One specific thing about the company I want to reference: [a product, initiative, news item, or value] My most relevant background fact: [specific experience or achievement]
The Right Workflow: AI + Your Input
The most effective approach treats AI as a writing collaborator, not an author. Here is the workflow that produces the best results:
- You supply the facts. Before touching any AI tool, write down every real accomplishment, metric, and responsibility you want to include. Numbers, team sizes, dollar amounts, percentages — everything specific.
- AI improves the language. Give AI your raw facts and ask it to make them sound compelling. This is where it genuinely helps.
- You verify everything. Read every AI-generated line with the question: "Is this true, and can I back it up in an interview?" Delete or correct anything that isn't.
- You edit for voice. Read the full document aloud. Any sentence that doesn't sound like something you would actually say needs to be rewritten. Generic AI language is detectable — personalization is not.
- You tailor per application. AI makes tailoring your resume to each job description much faster. Use it every time, not just once.
Getting Consistent Results From Any Assistant
Whichever assistant you use, the quality of the result depends mostly on what you give it and the rules you set:
- Give it facts, not adjectives. A short list of what you actually did, with results you can verify, beats "make this sound impressive."
- Set rules up front. Tell it to use only the facts you supply, ask when something is missing, and mark anything it assumed.
- Work one job at a time. Start a fresh conversation for each job description so details from one application do not leak into the next.
- Check the output against your records. Ask it to list every number, skill and credential in its draft, then confirm each one yourself.
Assistants change often, and features and limits differ between providers and plans. A careful process matters more than which assistant you choose.
Example bullets and figures in this article are illustrations, not real people's results. On your own résumé, use only facts and numbers you can verify and explain.