It depends on what bitrate you are targeting, and the source content.
AV1 does not outperform H265 at high bitrates (and in certain cases, medium bitrates). What is considered "high bitrate" is dependent on source content, but a good rule of thumb is 40 MBit (think BluRay quality) or more for 4k content almost always goes to H265.
For AV1, depending on what you are encoding, and how much extra time you want to dedicate to experimentation, take a look at grain synthesis (you will want to test decode capabilities on that one).
AV1 does not outperform H265 at high bitrates (and in certain cases, medium bitrates). What is considered "high bitrate" is dependent on source content, but a good rule of thumb is 40 MBit (think BluRay quality) or more for 4k content almost always goes to H265.
For AV1, depending on what you are encoding, and how much extra time you want to dedicate to experimentation, take a look at grain synthesis (you will want to test decode capabilities on that one).