Just to precise, when I said bruteforce I didn't imagine a bruteforce of the calculation, but a brute force of the code. LLMs don't really calculate either way, but what I mean is more: generate code -> try to run and see if tests work -> if it doesn't ask again/refine/etc. So essentially you are just asking code until what it spits out is correct (verifiable with tests you are given).

But yeah, few years ago this was not possible and I guess it was not due to the training data. Now the problem is that there is not much data left for training, and someone (Bloomberg?) reported that training chatGPT 5 will cost billions of dollars, and it looks like we might be near the peak of what this technology could offer (without any major problem being solved by it to offset the economical and environmental cost).

Just from today https://www.techspot.com/news/106068-openai-struggles-chatgpt-5-delays-rising-costs.html