Just eyeballing the data, BPS spends a good deal more per student than the top suburban districts like Newton, Needham, Lexington, etc., with of course terrible results.
Latest 2017 data from BPS shows ~$21K per pupil spending. (I’m guessing this is not a fully-costed number and doesn’t include any imputed rent or capital cost on all the city owned property, or accrual of pension liabilities for teachers in excess of cash contributions to pension funds.) I’m also not sure if that number includes Federal transfers, or if that is simply the expenditures of BPS, so there might be even more spending than indicated.
Mass DOE has a neat sortable spreadsheet of spending per pupil by district here: http://profiles.doe.mass.edu/statereport/ppx.aspx