I Built an AI Resume Analyzer with GPT-5 vs GPT-4o-mini… and the Results Surprised Me 🚀

Abhishek Saxena — Fri, 27 Mar 2026 16:02:08 +0000

👉 🔗 Live Demo: https://ai-resume-analyzer-indol-one.vercel.app/
👉 💻 GitHub: https://github.com/abhi-123/ai-resume-analyzer

90% resumes get rejected before a human sees them.

So I built an AI Resume Analyzer to understand why.

This tool:
• Analyzes resumes against job descriptions
• Calculates an ATS-style score
• Highlights strengths, weaknesses, and gaps
• Suggests actionable improvements

But here’s where it got interesting…

I tested two models:
→ GPT-4o-mini (fast & cheap)
→ GPT-5 (slower & more expensive)

The difference?

GPT-4o-mini:
• Quick and decent insights
• More general suggestions
• Higher (but slightly generous) scores

GPT-5:
• Much deeper analysis
• More realistic scoring
• Extremely actionable suggestions (almost like a career coach)

Example:
Instead of saying “improve backend skills,” GPT-5 suggested:
→ Build microservices (REST/gRPC)
→ Deploy using Docker + Kubernetes
→ Add CI/CD pipelines and observability

That’s not just feedback — that’s a roadmap.

💡 Key takeaway:
Fast AI improves UX.
Smart AI improves decisions.

The real power is combining both.

So I added:
⚡ Fast Mode (instant results)
🧠 Deep Analysis Mode (advanced insights)

Would love your feedback 👇
What would you improve in this tool?

Have you ever tested different AI models like this?

AI #React #WebDevelopment #BuildInPublic

Forem: Abhishek Saxena

I Built an AI Resume Analyzer with GPT-5 vs GPT-4o-mini… and the Results Surprised Me 🚀

AI #React #WebDevelopment #BuildInPublic