[*Steel wind strike*](https://www.dndbeyond.com/spells/steel-wind-strike)'s spell description (XGtE, p. 166) states:

> You flourish the weapon used in the casting and then vanish to strike like the wind. Choose up to five creatures you can see within range. Make a melee spell attack against each target. On a hit, a target takes 6d10 force damage.

Now, we know that *steel wind strike* isn't a melee *weapon* attack. Attacks can either be a melee or a ranged attack and they can either be a spell or a weapon attack (so 4 types total). Sometimes it matters, but for the purposes of this question, I wanted to get that out of the way. [Jeremy Crawford confirms](https://www.sageadvice.eu/2018/02/26/does-the-melee-spell-attack-from-steel-wind-strike-count-as-a-weapon-attack/) this.


My question is in regards to the Great Weapon Fighting fighting style and the Great Weapon Master feat, both of which have similar wording. 

The Great Weapon Fighting [fighting style][1] is described as follows (emphasis mine):

> When you roll a 1 or 2 on a damage die for an **attack** you make *with a melee weapon* that you are wielding with two hands, you can reroll the die and must use the new roll, even if the new roll is a 1 or a 2. The weapon must have the Two-Handed or Versatile property for you to gain this benefit.

The [Great Weapon Master][2] feat (PHB, p. 167) is described as follows (emphasis mine)

> - On your turn, when you score a critical hit *with a melee weapon* or reduce a creature to 0 hit points *with* one, you can make one melee weapon attack as a bonus action.

> - Before you make a melee attack *with* a heavy weapon that you are proficient with, you can choose to take a -5 penalty to the attack roll. If the attack hits, you add +10 to the attack's damage.

In my mind, this all hinges on whether or not *steel wind strike* is considered to be using your weapon or not. All other requirements are satisfied. You are making a melee attack (weapon attack is not specified) with *steel wind strike*'s melee spell attack, which satisfies Great Weapon Master. You are obviously making an attack, so Great Weapon Fighting is satisfied.

This leads me to conclude that if I am using that weapon, I can take a penalty for +10 damage on the spell effect, I can reroll 1s and 2s for the damage dice rolled, and if I kill something I can make a single melee weapon attack as a bonus action. 

The question is: **Are you making these attacks *with a weapon*?**


  [1]: https://www.dndbeyond.com/characters/classes/fighter#FightingStyle
  [2]: https://www.dndbeyond.com/characters/feats/great-weapon-master