Cost (Civilization Advance)
Determines the cost, in beakers, of researching the selected advance. Note that this value is multiplied by a cost factor which determines how many beakers it actually costs to research the selected advance. The human player’s cost factor is always 10. Depending on the difficulty level, the AI’s cost factor can range from 20 (Chieftain level) to 6 (Deity level).
The AI cost factors can be modified via the difficulty levels page.