Sometimes a large green one will have some good heat to it, but it's hit or miss, it may have no heat near the tip and 1/2 way up you hit some heat and then more at the top. When they are ripe red then the heat is more evenly distributed. Do you have a pic of what the pods look like now?

The pod s is still tiny i was just curious when the pepper is hot

The riper they get, the hotter they get. Cayennes that size might not have any heat. They will get to be 4 or 5 inches long and will stay green for quite a while before they finally turn red (ripe).