Yes, the fellowship is paid. The stipends are fixed but vary by the cost of living of the fellowship location. For Pittsburgh, the stipend is $10000 for the summer and should be more than enough to cover travel, housing, and other expenses over the summer.
While budgeting for the program, please keep in mind that the stipend qualifies as taxable income. Due to our large number of international fellows, we cannot advise on the tax implications related to the stipend. We recommend consulting with a lawyer for tax-related questions/concerns.