There is only one standard IQ test that accurately measures intelligence. And yes, that one is very accurate. Anyone who says their IQ is over 145 is lying, mistaken, or took a different test because it maxes out at 145.
The average IQ by definition is 100 and the standard deviation is 15. 3 standard deviations above the mean is 145. After that, the bell curve flattens out. Those outliers are extremely rare and cannot be accurately measured, only estimated. Albert Einstein or Nikola Tesla may have been over 145, but I seriously doubt anyone on this forum, or even anyone that anyone on this forum knows IRL, is actually at or over 145.
Only about 5% or so of the population is over 130.