To add AI-powered, spoken commentary to more than 20,000 video clips produced at the Masters, the team started with a large language model (LLM), which had been trained on a massive corpus of language data. They then began adding “domain expertise” to the model by training it on the specific language of golf and the Masters. During the tournament, every video clip is processed by two neural networks making hundreds of millions of computations. The AI model produces thousands of possible sentences to describe each shot, and then selects the best based on quality and variety.