The Ultimate Guide to OpenAI Models (GPT-4o vs. GPT-4.5 vs. o4-mini): Which One’s Right for You?
Last Updated on August 29, 2025 by Editorial Team
Author(s): Parsa Kohzadi
Originally published on Towards AI.
Not sure which OpenAI model to use? This guide helps you pick the best one for writing, coding, or strategy — fast.
Most people are using the wrong AI model — and it’s silently sabotaging their results. With over 7 OpenAI models now available and millions of users confused daily, choosing the wrong one can cost hours and money.

This article provides a comprehensive overview of various OpenAI models including GPT-4o, GPT-4.5, and o4-mini, explaining their unique features, best-use scenarios, and real-world applications. It emphasizes the importance of choosing the right model to optimize productivity and outcomes in tasks such as creative writing, coding, and data analysis.
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