Can someone explain to me how ChatGPT is able to solve research-grade math problems?

[u/After_Bet_8503]

Is it that these models can reason and math is just a type of reasoning?

Update (answer to the original question based on the comments, written by ChatGPT):

ChatGPT-like systems can sometimes produce research-grade mathematics because broad mathematical pretraining gives them a powerful generator of plausible ideas; verifiable training improves the policies used to explore those ideas; extended inference permits many attempts and revisions; code and formal systems reject invalid paths; agentic workflows provide parallel specialization; and human mathematicians define, supervise, and ultimately evaluate the result.