On the whole GPT-4 to GPT-5 is clearly the smallest increase in lucidity/intelligence. They had pre-training figured out much better than post-training at that point though (“as an AI model” was a problem of their own making).
I imagine the GPT-4 base model might hold up pretty well on output quality if you’d post-train it with today’s data & techniques (without the architectural changes of 4o/5). Context size & price/performance maybe another story though
I imagine the GPT-4 base model might hold up pretty well on output quality if you’d post-train it with today’s data & techniques (without the architectural changes of 4o/5). Context size & price/performance maybe another story though