Any fuzzer needs to compare its results to AFL (American Fuzzy Lop), "a free software fuzzer that employs genetic algorithms in order to efficiently increase code coverage of the test cases." https://en.wikipedia.org/wiki/American_Fuzzy_Lop_(software)

At one point it was considered state-of-the-art. As a project it's since been superseded by AFL++ - https://aflplus.plus/ .