Guide to OpenAI API Models and How to Use Them

OpenAI models have evolved drastically over the past few years. The journey began with GPT-3.5 and has now reached GPT-5.1 and the newer o-series reasoning models. While ChatGPT uses GPT-5.1 as its primary model, the API gives you access to many more options that are designed for different kinds of tasks. Some models are optimized […]

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