To make a competitive application to Oxford, you need to have predicted top grades at A-level (excluding General Studies), or equivalent. However, even excellent grades will not guarantee you an offer, as Oxford usually only has around 3,300 places each year. Offers for Oxford places are between AAA and AAA at A-level, depending on the course. Successful applicants typically have a high proportion of 7, 8, and 9 grades at GCSE. Oxford prefers applicants to have as many As and 9s as possible, and many applicants have a lot of 7, 8, and 9 grades. The entry requirements for Oxfords most competitive courses, including Mathematics and Statistics, Economics and Management, and Computer Science, are at the top end of Oxfords standard offer range at AAA-AAA at A-level. Oxford University requires applicants from the US to have either four or three Advanced Placement (AP) exam scores of five, depending on the subjects required for the course students are applying to and their standardized test scores. The minimum GPA requirement for US students applying to Oxford University is 3.7, and a higher GPA is expected for applicants who like to enroll in more competitive courses.

In summary, the grades you need to get into Oxford depend on the course you are applying to, but generally, you need to have predicted top grades at A-level or equivalent, and successful applicants typically have high grades at GCSE. However, having the required grades in the correct subjects does not guarantee you a place at Oxford, as the university has rigorous admissions requirements and a highly competitive applicant pool.