[quote=@BladeSS4]
Not all ANBU are Jounin.  Or at least I didn't think they were.  They were just random shinobi that had covert skills that written under classified missions, I would think they have the same ranks as the others. I could be wrong, A chunin in the ANBU would just be a Chunin.  Sort of what Sai was in Naruto.
[/quote]
Generally ANBU was its own rank that was neither chunin or jonin, but it can be presumed that they were [i]typically[/i] enlisted from jonin-level individuals as they are the elite task force of every ninja village. Itachi and Kakashi-types were very uncommon.