The impressive Fabio Aurelio hauled Liverpool level with a powerful free-kick moments later, before Hermann Hreidarsson restored Portsmouth's advantage.
But goals in the final five minutes from substitutes Kuyt and then Torres completed an epic fightback to keep up the pressure on title rivals Manchester United.
The Spaniard added: "We saw a lot of resolve. We saw different players working hard on the pitch, trying to keep the ball, Fernando and Xabi Alonso did that well.
Benitez praises resilience of squad
"They all worked hard for the team and the fans.
"Every win is an important victory, especially now that we are close to the top. I'm really pleased that the lads showed they had character and played well. We need to keep working and keep our confidence high now."
Portsmouth manager Tony Adams remained upbeat and confident of keeping his position at Fratton Park despite the defeat which leaves his side without a win in the league since 30 November and one point above the relegation places.
When asked if he still was well supported at the club, the former England defender said: "One hundred percent yes. I have spoken to the chairman and so far so good."
Adams still has faith despite defeat
He added: "We just need to start picking up points. We have to fight all teams playing around us and we'll fight all the way.
"Performances don't lie and the crowd were fully supportive of the players, their work rate and performance. They have given it all for me but unfortunately they are making mistakes.
"They are great players here but it's been the same thing all season, right back to first game. I have faith in them still."
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