Rubuta ci gaba don wannan sakin layi - Cheptai ya fara yin tasiri a matakin manya a cikin kakar 2013, yana farawa tare da zama na biyu a Cross Internacional de Itálica da na uku a Cross Internacional Juan Muguerza. Matsayi na biyu ga Margaret Muriuki a Gasar Cin Kofin Kasa ta Kenya ya kawo zabin ta ga manyan 'yan wasan kasar, kuma ta kammala na goma a Gasar Cin Kofin Duniya ta 2013 IAAF
(ko da yake kawai na biyar mafi kyau a cikin tawagar 'yan wasan Kenya). Ta yi gasa a gasar IAAF Diamond League a karo na farko a wannan shekarar kuma ta gudanar da mafi kyawun lokaci na minti 8:56.20 da minti 14:50.99 don mita 3000 da 5000.