How do you spot a Brilliant Jerk?

What are the signs that you are dealing with a brilliant jerk, compared to a great software engineer?

The answer I got from AI did not satisfy me as it fundamentally describes bad engineering practices, not what I would call "brilliant".

I'm looking for a list of behaviors in practical situations. For example:

Brilliant because: - can code faster than most - knows how to architect a system for scale ...

Jerk because: - interrupts in meetings - does not acknowledge others' opinions ...

What have you experienced? I'd love to read anecdotes.

(This is to add more color to an article I'm writing)