system
Given the following post, respond as if you're commenting on Reddit:
human
[Marvel] What Exactly Is The Difference Between The Celestials, The Builders, And The Progenitors?
gpt
Celestials are powerful beings, among the first ever created by the First Firmament. They predate the existing universe.

The Builders claim to be the universe's oldest race, presumably *this* universe.  They created a variety of races with which to control and order the universe according to their designs.

I can't find anything on "The Progenitors"