In the title compound, C(16)H(13)ClFN(3)O(2)S, the dihedral angle between the benzene rings is 4.47 (3)°. The conformation of the thia-zine ring is a half-chair and the Cl atom is in an axial orientation. In the crystal, mol-ecules are linked by C-H⋯F inter-actions, generating C(12) chains propagating in [011]. Aromatic π-π stacking inter-actions [centroid-centroid separations = 3.753 (2) and 3.758 (2) Å] also occur.