"The coup attempt has been foiled," General Umit Dundar said on television, adding that 90 people -- including 41 police and 47 civilians -- "fell martyrs." The remaining two were military officers.
He also said many army commanders were taken by the coup plotters to "unknown locations".
Dundar said coup attempt "was rejected by chain of command immediately".
"The armed forces is determined to clear the army of members of parallel structure," he said, referring to loyalists of US-based Turkish cleric Fethullah Gulen blamed for orchestrating a coup to topple the government.
Soldiers and tanks took to the streets late on Friday and multiple explosions rang out throughout the night in Ankara and Istanbul, the two biggest cities of the strategic Nato member of 80mn people.
After a night of drama and bloodshed, at least 90 people had died and more than 1,150 people were wounded, according to state-run news agency Andalou.
Officials insisted the putsch bid was falling apart with over 1,560 officers held and close to 200 unarmed soldiers at the Turkish military HQ surrendering.
Crowds of flag-waving supporters of Erdogan's ruling Justice and Development Party (AKP) appeared to have turned the tide, defying orders of a curfew and marching out onto the streets to block the attempt to overthrow the regime.