WASHINGTON — Vice President Joe Biden on Monday offered a revised account that upgraded his role and downgraded Hillary Clinton’s in the discussions leading to the perilous raid that killed Osama bin Laden in 2011.

Despite a 2012 report that he counseled against the mission, Biden said at a forum at George Washington University on Tuesday that he actually advised President Obama in private to go ahead.

“I didn’t want to take a position to go if that was not where he was going to go,” Biden said, describing a Cabinet meeting where the decision was debated.

“As we walked out of the room and walked upstairs, I told him my opinion, that I thought he should go but follow his own instincts,” Biden continued.

“I never, on a difficult issue, never say what I think finally until I go up in the Oval [Office] with him alone.”

Biden made his comments at a forum with former Vice President Walter Mondale, amid reports that he is just days away from deciding whether to challenge Clinton for the Democratic presidential nomination.

Biden’s comments undercut the account given by Clinton, who has repeatedly said she was among the hawks urging Obama to green-light the mission, even as others urged caution.

“There were only two people who were definitive,” Biden recalled. “[Former CIA chief] Leon Panetta said go and [former Defense Secretary] Bob Gates, who’s already publicly said this, said don’t go … Some ended up saying go, but it was such a close call.”

Biden’s account of his own views contradicts what was reported in 2012.

“Mr. President, my suggestion is, don’t go,” Biden told lawmakers at a Democratic retreat, The New York Times reported at the time. “We have to do two more things to see if he’s (bin Laden) there.”

Biden didn’t challenge that story when it was printed three years ago.

His comments also clash with Clinton’s recollections in her book “Hard Choices” and in public comments.

“The president’s top advisers were divided. The intelligence was compelling, but far from definitive. The risks of failure were daunting,” Clinton wrote, describing her decision to recommend a strike.

She further described the decision at a New York gala in December 2013: “It became a very personal journey that I made in coming to my conclusion to recommend that there was sufficient grounds for the president ordering the SEAL raid,” Clinton said.

She described herself in the Democratic debate last week as “one of his few advisers” to recommend a strike.