Yes, and no. In general in the most overview sense, Baltimore City has governing authority of a county, it is effectively a county jurisdiction.
However, Baltimore City actually has LESS autonomy over a variety of things than any other of the several cities I have previously lived in (even those which were in counties) -- the state government in Annapolis controls so many things that I'm used to being controlled much more at municipal level in other cities I've lived in. From liquor licenses, to schools, to the police department, many decisions are made at the state government legislative level. (The Baltimore City council has pretty much NO authority over the police at all -- it's all the state government in Annapolis).
I don't think this is necessarily related to Baltimore City being an independent county-level jurisdiction (although it might be). I think there are a variety of historical factors, stretching back to colonial times (when the Maryland colonial elites were in Annapolis, and never intended Baltimore to be a big city or power center at all, and viewed Baltimore's growth as a threat to their power), to Civil War times (the majority of Maryland, and Baltimore, (white of course) elites sympathized with the confederacy, but the union federal government basically took control of the MD state government -- cause if Maryland went confederacy, DC would be surrounded -- and made sure that confederate-sympathizing Baltimore had limited autonomy), to more recent times (white flight, racism and white supremacy, white people don't believe majority-Black Baltimore can be trusted to run itself).
