In the title compound, C(23)H(21)FN(6)O, the dihedral angle between the fluoro-phenyl and pyrimidinone rings is 75.9 (1)°, and the dihedral angle between the methyl-phenyl and pyrazole rings is 40.3 (1)°. In the crystal structure, weak C-H⋯π(arene) and C-N⋯π(arene) inter-actions and intermolecular C-H⋯N and N-H⋯O hydrogen-bonding inter-actions are present.