In the methanol solvate of the title 1:1 cocrystal, C(29)H(28)F(6)N(4)OS·C(5)H(9)NO(2)·CH(4)O, the l-proline mol-ecule exists as a zwitterion. In the crystal, the disubstituted thio-urea, l-proline and methanol mol-ecules are linked by N-H⋯O and N-H⋯N hydrogen bonds, forming a two-dimensional array in the ab plane.