In the title compound, C15H14N4O2, the triazolo-pyrimidine ring system is almost planar (r.m.s. deviation = 0.02 Å) and the phenyl ring is inclined to its mean plane by 42.45 (9)°. The carboxyl group is inclined to the triazolo-pyrimidine ring mean plane by 57.8 (3)°. In the mol-ecule, there is a short C-H⋯O contact involving the carbonyl O atom and an H atom of the adjacent methyl substituent. In the crystal, neighbouring mol-ecules are linked by C-H⋯O hydrogen bonds, forming chains propagating along [010]. There are also weak π-π inter-actions present involving the pyridine and phenyl rings of neighbouring chains [inter-centroid distance = 3.8580 (16) Å].