This matchup has no clean canonical answer. Saitama is written as literally limitless within OPM. Goku operates in a universe with measurable power levels. Cross-universe comparisons cannot have objective answers.

The Saitama Problem

Saitama always wins with one punch — it is literally the premise of his series. His power is never quantified. Any argument that Goku beats him requires rejecting OPM own rules.

The Goku Argument

Goku power is measurable and operates at universal scale in Ultra Instinct. Dragon Ball has an established ceiling that OPM does not engage with.

The Honest Answer

This battle is unanswerable — and that is the point. Saitama exists to satirize power scaling. Goku exists in a universe where power scaling is the entire premise. Enjoy debating it, but there is no objective answer.