What is S1 AI model, the OpenAI o1 rival trained in less than $50?

In January, the world witnessed Chinese AI startup DeepSeek set off a revolution with its cost-efficient, state-of-the-art AI models. The company unveiled two models, DeepSeek-V3 and DeepSeek-V1, that rivalled the performance of frontier models by OpenAI and Google, and that too at a fraction of the cost used by big tech. DeepSeek has paved the way for more prudent innovations in AI. Now, a new model has sparked curiosity in the AI community. Researchers at Stanford and the University of…