Is This the Best Coding Model in the World? Claude Sonnet 4.5

Snyk

Oct 6, 2025

In this episode of our AI Coding Tools series, we test Claude Sonnet 4.5 to see if it can build a secure note-taking app. The model claims to be the best in the world — but does it live up to the hype?

We’ll cover how it codes, where it shines (or struggles), and how it stacks up against other AI coding assistants.

Use Snyk for free to find and fix security issues in your applications today! https://snyk.co/ugLYn

✍️ Resources ✍️

⏲️ Chapters ⏲️

00:00 - Intro

00:28 - Getting started with Claude

01:53 - Results

04:45 - Running the app

06:51 - Security testing with Snyk

09:39 - Conclusion

10:44 - Outro

⚒️ About Snyk ⚒️

Snyk helps you find and fix vulnerabilities in your code, open-source dependencies, containers, infrastructure-as-code, software pipelines, IDEs, and more! Move fast, stay secure.

Learn more about Snyk: https://snyk.co/ugLYl

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