OpenAI just released GPT-5—it just didn’t call it that

OpenAI's GPT-4.5 demonstrates the power and limits of pretrained models.

When OpenAI released GPT-4 in March 2023, it was dramatically more capable than previous models. Its success bolstered the concept of “scaling laws”: the idea that dramatically increasing the size of a model—and the amount of computing power used to train it—will yield a much more capable model. And so for the rest of 2023, and into 2024, there was cons…