What is the actual "value" of credits? $100 is "best value"....but what am I going to actually get?

It says $100 is "best value"...but there is no indication what I'm actually buying. Is it not scaling in a line, i.e. $20 = 4x $5?

EDIT: This is the Claude Console pricing, for credits to use with the API, not with Claude Code / CoWork.