The 13,800 number seem like it would be quoted from their annoucement of the $830 million funding round they had in March.

Here's CNBC's article on it: https://www.cnbc.com/2026/03/30/mistral-ai-paris-data-center...

Not sure if they would have received the full number yet, but it's been a few months so they certainly could have. Bit of a moot point when the comparison was against Poolside's Laguna which isn't really "general" SOTA but SOTA-for-the-size, and Mistral is clearly capable of training 700B or 120B models that are that when released considering they have done that... A 2-3T model is probably possible with the GPUs they have but they would need to spend most of their resources on it, and it's not clear why they would want to.