The 31-year-old striker arrived from Charlton last summer but failed to make the impact he had hoped, scoring just three goals in 33 Championship appearances.
Bent's poor form and the arrival of Ecuadorian striker Benitez has lead to speculation that the former Everton hitman could be surplus to requirements.
However, Bent maintains he is happy at St Andrews and believes he is still capable of earning a place in Alex McLeish's starting eleven.
"I've two years left of my contract. I signed for Birmingham because I wanted to play in the Premier League and to help them get there," Bent told the Birmingham Mail.
"That's what we achieved. I don't want to move anywhere else, but I'm not going to shy away from anything that is being said because football is football.
"Right now I'm happy at Birmingham and determined to show what I can do.
"I'm big and ugly enough to deal with any criticism. I'm just trying to work hard to get into the side in the Premier League where I know I can play and score goals."
"My eyes weren't closed last season. I know that several people weren't happy with me. Certain people wanted more out of me.
"Was that fair or unjust? Personally I don't think I played enough to get myself going. But that's just the way it worked out.
"We have a big squad and I, more than anyone, want to succeed and do better. Whether that means I'm going to be at the club or somewhere else, I don't know."