a.) novel isolated achievements of an AI, or
b.) the result of continuous focused in-house training with data involuntarily contributed by thousands of researchers using the LLM, aiming to make a press-release to boost the reputation of the AI in question...
It's quite a novel situation, where thousands of people use a tool from the same supplier to solve a problem, for the supplier to silently join the race, consolidate all work and jump in at the last minute to claim that HE solved the problem.
Like e.g. Nike removing the runner from their shoes at last minute to claim that the race was won by the shoe alone...