Cost per successful request
A cheaper plan is not cheaper if more of its requests fail. Enter what you spent, what you attempted and what succeeded on two plans, tested on the same targets over the same days, and see what each usable result cost. The rates are yours; we don't publish success rates of our own.
Formula: amount spent divided by successful results. Success rate is successful results divided by attempted requests. With no successful results there is no cost per result, and figures that cannot be right (more successes than attempts) are left out. A difference that rounds to zero at four decimal places is treated as a tie.
Getting numbers you can compare
Run both plans on the same targets, request mix and time window, and count a result as successful by the same rule. A provider's own success-rate claim is self-reported: if you use one, label it as the provider's figure, not a measurement.
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