Super Saiyan 4 (超スーパーサイヤ人じん４フォー, Sūpā Saiya-jin Fō) is an advancement of the Super Saiyan and Golden Great Ape forms that first appears in Dragon Ball GT, with an updated incarnation of it later appearing in Dragon Ball Daima. As part of the Great Ape branch of Super Saiyan transformations, the Dragon Ball GT incarnation of the form is separate from the standard branch of Super Saiyan forms despite being named in similar number. A devastatingly powerful form, it debuts with Goku's awakening during the fight with Baby.
