Resolves to the maker of Mystery Model Alpha on https://www.predictionarena.ai/.

Feel free to add your own options.

Warning if you add an answer: I will NOT resolve to imprecise answers, e.g., "An unknown startup" or to teams within companies, e.g., "The DeepMind team", or a specific person. (Unless it is actually a one person operation not hosted within a company.)

I will extend this market until the model maker is announced.