At least as current as the reporters ever get. The Defense Manpower Data Center (DMDC), however, has to offer quarterly reports on US deployments overseas, and appears not to have the luxury of just fabricating numbers to suit the narrative.
Which quickly reveals what we already knew, that the Pentagon's reported figures meant for the American public were flat out lies. In reality, there are 8,992 troops in Iraq and 1,720 in Syria, as of September,and the numbers have only risen since then.
Even this more accurate figure from the DMDC, in addition to being months out of date, is just the low end of the real figure, because buried at the bottom of the per-country deployments is another number, 29,092 US troops, whose locations are simply "unknown."
That too seems like it should be more of a scandal than it is. The figure tacitly admits that some 10% of US troops deployed overseas are deployed so secretly that even the report responsible for accounting where they all are doesn't have any idea where they might be.