How to tell a thunderbolt 4 cable from thunderbolt 5

[blinker]

Apple doesn't put the number on their cables, so if I don't mark them when I get them (with a silver Sharpie) I can't see any way to tell what level a given cable is.

 

[ab22]

Isn't there a (tiny) 5 on the metal part of the plug ?

https://www.reddit.com/r/mac/comments/1gja4m1/ah_apple_this_is_going_to_be_fun_thunderbolt_5

 

[blinker]

Isn't there a (tiny) 5 on the metal part of the plug ?

OMG! You're right; I never thought to look that closely since I expected it to be on the black plastic next to the lightning bolt symbol.
It's nowhere on the TB 4 cable, but yes, it's there (really tiny) on the metal part of the TB5.

 

[Fishrrman]

"It's nowhere on the TB 4 cable, but yes, it's there (really tiny) on the metal part of the TB5."

Small, indeed: