What's the meaning of ぜ at the end of sentence? Is ぜ a particle?
What's the difference between:
I found a couple of explanations on the web but none I could fully comprehend.
ぜ and ぞ are sentence-final particles used (primarily) by male speakers which are more colloquial versions of the particle よ.
In order of decreasing politeness, they are
The addition of よ・ぞ・ぜ give the statement an assertive feel, maybe like an exclamation mark or adding something like "hey!" (although that's already represented in the sentence by おい).
Speaking of which, おい is also a very colloquial way of getting someone's attention, which fits well with the use of ぜ over よ.
This question also has an explanation for ぞ, which carries over to ぜ as well.