**FP1 sessions at the Circuit of the Americas remain inherently unpredictable due to teams prioritizing setup experimentation, long-run data collection, and tire evaluations over outright pace.** With 2026 technical regulations still bedding in and COTA offering a mix of high-speed corners and elevation changes, multiple squads can post competitive times depending on their chosen programs and track evolution. Recent form from other venues shows Red Bull, Mercedes, and Ferrari often trading top spots early in weekends, while midfield runners like Williams, Alpine, and Audi occasionally benefit from specific setup tweaks. The even distribution of implied probabilities across more than twenty drivers captures this session-specific uncertainty, where historical FP1 results have frequently featured surprise leaders before qualifying sharpens the picture. Weather variables and any last-minute component changes could further shift the order.