Highest level

But even if he wasn’t allowed to take the chunin exams, he could still be
promoted directly to chunin if the village administration and the jonin
recommended it. And looking at Team Two’s results, it was immediately
obvious just how much Itachi contributed to the team. It was a fact that his
judgment surpassed that of even his supervising jonin, and he had reached the
highest levels in everything from ninja arts to fighting techniques, all of
which had allowed him to rescue his team from danger any number of times.

Itachi Shinden: Book of Bright Light Chapter 2 Part 3