Context: In July 2021, after 25 seasons as members of the Big 12, Texas and rival Oklahoma accepted invitations to join the Southeastern Conference (SEC) no later than the 2025 season. In February 2023, the Big 12 announced that the two schools had negotiated a combined $100 million early termination fee in order to leave for the SEC a year before the schools' media rights deal with the Big 12 was set to expire. The Longhorns football team will continue competing in the Big 12 through the 2023 season before moving to the SEC in 2024. Input: How much was the termination fee for the University of Texas and Oklahoma University to leave the Big 12 conference? Output: The context provided indicates that the Big 12 announced in February 2023 that Texas and Oklahoma had negotiated a combined $100 million early termination fee to leave the conference a year before their media rights deal expired. Therefore, the termination fee for Texas and Oklahoma to leave the Big 12 conference was $100 million.