[postalcoder]

> You need to really focus on areas such as context window, tool calling and specific aspects of reasoning steps to start noticing differences.

This is like saying "the current models and the old models are the same if you ignore every important advance they've made"

[locknitpicker]

> This is like saying "the current models and the old models are the same if you ignore every important advance they've made"

Please go ahead and list the single most important advance a frontier model has over, say, gpt4.1.

Reasoning is one of the main features, and in practice all it does is waste compute to rewrite your original prompt. See how GPT 5.4 burns through compute by running additional prompts where it acts like your own interpreter, with lengthy reasoning prompts on "the user is asking for (...)" as if you are completely unable to stitch together a usable prompt. That's your frontier model.