Can Claude Opus 4.5 Build a SECURE Note Taking App?

Snyk

Dec 1, 2025

Can Claude Opus 4.5 actually build a secure, fully functional note-taking app? In this video, I challenge the latest Claude model to create an app with real features — create, edit, update, delete, plus basic security — and see if the code holds up in practice. This is a real test of how far AI can go in building usable software.

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✍️ Resources ✍️

⏲️ Chapters ⏲️

0:00 - Intro

00:39 - Prompt

01:57 - Results

04:52 - Security testing

07:14 - My thoughts

09:14 - Outro

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