Turn AI Output (ChatGPT, Claude, Gemini) into a Professional Resume PDF

In 2026, the question isn't whether to use AI for your resume — it's which AI to use, and how to get the best results from each one.

We already have a step-by-step guide for turning ChatGPT output into a PDF. This post goes broader: how ChatGPT, Claude, and Gemini each handle resume writing differently, the best prompts for each tool, and how to combine them for a resume that's stronger than what any single AI produces.

Note: AI models are updated frequently. These observations reflect behavior we observed in early 2026 and may change as each tool evolves.

How Each AI Writes Resumes Differently

We gave all three tools the same prompt — "Write a professional resume in Markdown for a Senior Product Manager with 7 years of experience" — and compared the results.

ChatGPT

Strengths: Comprehensive output. ChatGPT generates detailed, well-structured resumes with plenty of achievement bullets. It's good at following complex multi-part prompts and producing long-form content.

Weaknesses: Can be verbose. Tends to use filler phrases like "results-driven" and "leveraged cross-functional synergies." The output sometimes reads like a thesaurus was involved.

Best for: First drafts. When you need a complete resume generated from scratch with all sections filled in.

Claude

Strengths: Natural, concise writing. Claude produces text that sounds like a human wrote it — fewer buzzwords, tighter sentences. Especially good at following nuanced instructions ("prioritize achievements over responsibilities" actually works).

Weaknesses: Can be too concise. Sometimes generates shorter bullets that could use more detail or metrics.

Best for: Refining and editing. Take a ChatGPT draft and ask Claude to tighten the language, remove fluff, and make it sound more authentic.

Gemini

Strengths: Strong at incorporating industry-specific keywords naturally. Good at ATS optimization when you mention the target job description. In our testing, it tended to front-load important terms in bullet points.

Weaknesses: Output structure can be less consistent. Sometimes generates unusual section ordering or formatting variations.

Best for: Keyword optimization. When you have a specific job description and need your resume tailored to match its terminology.

Best Prompts by AI Tool

Each tool responds differently to prompts. Here's what works best for each:

ChatGPT — The Comprehensive Draft

Create a professional resume in Markdown for a [Job Title] with [X] years
of experience in [industry]. Include:
- 2-sentence professional summary with a measurable career highlight
- 3 positions with 4 bullet points each, every bullet starting with
  an action verb and including a specific metric
- Skills section organized by category (Technical, Tools, Soft Skills)
- Education with relevant coursework or honors

Use ## for section headings and ### for job titles. Format dates in italics.

Claude — The Human-Sounding Refiner

Here is my current resume draft in Markdown:

[paste your draft]

Rewrite it with these priorities:
1. Remove any phrases that sound AI-generated or overly corporate
2. Make each bullet point one line maximum
3. Replace vague achievements with specific ones (ask me for details
   if needed)
4. Keep the Markdown formatting intact

Gemini — The Keyword Optimizer

Here is a job description I'm targeting:

[paste the job description]

And here is my current resume in Markdown:

[paste your resume]

Optimize my resume for this specific role:
1. Incorporate relevant keywords from the job description naturally
2. Reorder bullet points so the most relevant achievements are first
3. Adjust the skills section to match what the role requires
4. Keep the Markdown formatting and section structure

The Three-AI Strategy

The most effective approach uses all three tools in sequence:

Step 1 — ChatGPT generates the draft. Give it your background and target role. Let it produce a comprehensive first version with all sections filled in.

Step 2 — Claude refines the language. Paste the ChatGPT output into Claude and ask it to cut the fluff, tighten sentences, and make it sound like you actually wrote it.

Step 3 — Gemini optimizes for the job. Paste the Claude-refined version into Gemini along with the job description. Let it adjust keywords and ordering for ATS alignment.

Step 4 — You do the final edit. No AI gets everything right. Check for:

Accuracy — AI fabricates details. Verify every company, date, and metric.
Your voice — Replace any remaining generic phrases with specific details only you'd know.
Honest representation — Don't let AI inflate your experience beyond reality.

Creating Multiple Versions

One workflow that works particularly well: generate different resume versions tailored for different types of roles.

Leadership-focused version (Claude) — Emphasizes team management, strategy, and stakeholder communication
Technical-depth version (ChatGPT) — Focuses on architecture decisions, technical achievements, and tools
ATS-optimized version (Gemini) — Targeted to a specific job posting with matched keywords

Paste each into ResumeMD, export all three as PDFs, and submit the version that best matches each job posting. Since the editor doesn't require signup, you can do this in a single session.

Common Mistakes When Using Multiple AIs

Not verifying facts between versions. When you run content through multiple AIs, details can drift. One AI might round "37% improvement" to "40%." Always check the final version against reality.

Mixing inconsistent tones. If ChatGPT writes your experience section and Claude writes your summary, the tone might not match. Do a final read-through for consistency.

Over-optimizing for keywords. Gemini is great at keyword insertion, but too many keywords makes your resume read like a job description instead of a career narrative. If a bullet point has more than 2 keywords, it's probably too dense.

Skipping the formatting step. All three AIs output Markdown — but pasting Markdown into Word or Google Docs gives you raw syntax symbols, not a formatted resume. Use a Markdown-native resume builder to render it properly.

Get Started

Generate your draft with ChatGPT
Refine with Claude
Optimize with Gemini
Format and export at ResumeMD

Three AIs, one resume, professional PDF in minutes.