AI is on normal. This first screenshot shows the starbase (lower right) the Iridium created a couple turns ago harvesting the nearby manufacturing relic (middle). Sorry about the colors, I am the darker orange Krynn.
This next screenshot shows the trade screen with the Iridium.
They don't have Xeno Archeology and neither of us have any of the more advanced Precursor relic techs. As far as I can tell, the Iridium just cheated itself a relic.