I think performance on AP english might be a quirk of how they dealt with dataset contamination. English and Literature exams showed anomalous amount of contamination (lots of the famous texts are online and referenced elsewhere) so they threw out most of the questions, leading to a null conclusion about performance.
Perhaps the model wasn’t allowed to read the sources for the free response section?
I think performance on AP english might be a quirk of how they dealt with dataset contamination. English and Literature exams showed anomalous amount of contamination (lots of the famous texts are online and referenced elsewhere) so they threw out most of the questions, leading to a null conclusion about performance.