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Codex vs Claude Code: Which AI Coding Agent Should You Actually Use?
24-08-2026 178

Codex vs Claude Code: Which AI Coding Agent Should You Actually Use?

Both are agentic coding tools. Both ship a desktop app, an IDE extension, a CLI and a web surface. The real difference is where each one puts its centre of gravity: Codex is built to delegate work to, Claude Code is built to work alongside. Here is the honest comparison — context windows, token efficiency, multi-agent coordination, price — and which to learn first.

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A luminary in the field of data science

Few can claim to know such a luminary in the field of data science as Dr Alvin Ang. Our correspondence has led me to realize the sheer breadth and depth of the field of data science. Only a true expert like Dr Ang could have revealed to me through his advocacy, teaching, publications, and real world experience how diverse the field truly is. From the very start I was star-struck, first by his academic achievements — a doctorate in Operations Research, a master's in Logistics and a bachelor's in Engineering, all from the world renowned Nanyang Technological University — and then by his experience in industry as well as in academia as a lecturer, trainer, consultant and analyst. He continues to impress and inspire me with his achievements. I highly recommend Dr Ang as the most reputable data scientist that I have been fortunate to know.

Patient Trainer Who Makes Sure We Really Understand

This is my second time joining Dr. Alvin Ang's class. I first attended last year on 16 Aug 2025. Today I signed up for the Excel Power Query and Power Pivot course. Dr. Ang is very patient. He makes sure we really understand, and he'll even invite us to a Google Meet to troubleshoot why Power Pivot or Power Query isn't working. He also shares tips to help speed up our work and make daily tasks easier.

Excellent Course for Beginners

Really enjoyed Dr Alvin Ang's Machine Learning 101 for Financial Trading course. He has a jovial and engaging teaching style that makes even complex machine learning concepts easy to understand — we were never bored! What I found especially valuable was how he clearly showed where and how machine learning fits into the different stages of an AI trading system. The conceptual materials and sample Python codes shared were also very useful for further learning and experimentation after the course. A fair note for anyone considering the course: this is not a course on profitable trading strategies. It focuses on the fundamental building blocks of data-driven systematic trading, which I think is exactly what beginners need to build a solid foundation. Highly recommended for beginners, or anyone looking to refresh their ML knowledge and understand how it is being applied to systematic trading today. Thanks, Dr Alvin, for the great insights and enjoyable learning experience!

Engaging Data Analytics with R Course

I had the opportunity to attend Dr Alvin Ang's Data Analytics with R course, and I enjoyed the class a lot. Dr Alvin Ang was able to explain R concepts very clearly and answer our questions promptly. His teaching style was very engaging (he includes some witty humour during the class from time to time). I would recommend anybody who wants to learn a skill to come sign up for a course at Tertiary Courses Singapore.
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