Prime Minister Benjamin Netanyahu said on Sunday that Israel was working with US President Donald Trump to advance Washington’s plan for ending the war in Gaza, although he appeared less optimistic than the American leader, who hours earlier claimed there was a “real chance for greatness” in the Middle East.

Trump’s vision to end the war in Gaza was presented to Arab leaders last week as a 21-point plan — a copy of which was obtained by The Times of Israel.

The president has sounded increasingly upbeat about his plan’s chance of success in recent days, and on Sunday morning took to Truth Social to declare that there was a real chance for GREATNESS IN THE MIDDLE EAST.”

“ALL ARE ON BOARD FOR SOMETHING SPECIAL,” he wrote.

“FIRST TIME EVER. WE WILL GET IT DONE!!!” Trump added in a follow-up all-cap post on Truth Social.

But when speaking to Fox News later in the day, Netanyahu appeared more cautious.

“We’re working on it,“ he told the network. “It’s not been finalized yet, but we’re working with President Trump’s team, actually, as we speak.”

“I hope we can make it a go, because we want to free our hostages, we want to get rid of Hamas rule, and have them disarmed, Gaza demilitarized, and a new future set up for Gazans and Israelis alike, and for the whole region,” the premier continued.

Casting further doubt on whether everyone was truly as “on board” with Trump’s vision as he claimed, a source familiar with the matter told The Times of Israel on Sunday that with Israel yet to sign off on the proposal, it had not even been presented to Hamas yet.

The source said that Arab countries have been submitting recommended edits to the plan they were presented with, and the US was expected to finalize the proposal on Sunday.

Last week, Trump indicated that he would need to meet with Netanyahu first in order for his plan to be finalized. The meeting will take place at the White House on Monday.

It is unclear whether Jerusalem will sign off on the proposal as it currently stands, given that several of the points directly contradict Netanyahu’s promises regarding the “day after” in Gaza, and the expectations of his far-right coalition allies.

One bone of contention is the Palestinian Authority, which Israel has sworn time and again will not be allowed to play any role in the enclave, while the Trump plan envisions it taking over at an unspecified date once it has “completed its reform program.”

The Trump plan also places an emphasis on creating conditions for “a credible pathway to Palestinian statehood,” another thing that Netanyahu has vowed will not happen on his watch.

To that end, Netanyahu told Fox that his opposition to the PA, which he strongly restated last week at the United Nations General Assembly, had not changed.

Pointing to what he said was the PA’s incitement tactics and its financing of terror, the premier said he doubted it could be persuaded to abandon such activities.

“I think that the credibility or the likelihood of the things — a reformed Palestinian Authority that changes completely its stripes… Some people will believe it happens. I don’t think it’s going to happen,” he said.

Netanyahu did tell the news network, however, that Israel would allow Hamas members safe passage out of Gaza if they were to end the war, but cautioned that “the details of this have to be worked out.”

“If Hamas leaders finish the war, release all the hostages, we let them out,” he said. “All of that, I think, is part of the plan. I’m not going to preempt it, because we’re having these discussions exactly right now.”

The Kan public broadcaster cited a source close to the premier as saying that “significant gaps” remained between Netanyahu and the White House on the conditions for ending the war.

According to the report, Netanyahu canceled his plans for Sunday in order to meet with his inner circle of advisers ahead of his meeting with Trump. He is also expected to meet with US Special Envoy for the Middle East Steve Witkoff before meeting with Trump.

While Israel and Hamas have yet to sign off on the plan, Jordan’s King Abdullah said on Sunday that many details of it were “in line with what has been agreed upon.”

Jordan and a number of other countries in the region have made or suggested several amendments to the US proposal since it was shown to them, the Qatari Al-Araby al-Jadeed news outlet reported Sunday.

One key change was a suggestion for the transitional Gazan government to be composed of Palestinian technocrats, rather than an international body as had initially been proposed, the outlet reported, citing an unnamed source familiar with the matter.

The international community should instead play a more hands-off role, the countries were said to have suggested, in the form of a supervisory body.

The amended plan would also see international peacekeeping forces stationed only along the Gaza border, rather than inside the Strip itself, which the report said had been the US’s original plan.

Offering more insight into the US’s expectations regarding the viability of Trump’s plan, Vice President JD Vance told Fox News that there was still a “very complicated” negotiation process happening behind the scenes with the US, Israel and Arab leaders, but he nevertheless felt “more optimistic” than he has in months.

“I think the president’s optimism is warranted here,” he said, referring to Trump’s social media posts. “I feel more optimistic about where we are right now than where we have been at any point in the last few months.”

“But let’s be realistic, these things can get derailed at the very last minute,” the vice president cautioned. “So while I remain very hopeful, I am cautiously hopeful.”

He said that the US proposal accomplished Washington’s three goals: releasing the hostages, making sure that Hamas is no longer a “terror threat” to Israel, and ensuring that aid can enter Gaza “for the many innocent people who are caught up in the conflict.”

The Fox News reporter then incorrectly claimed that Trump said earlier this week that he would not allow Gaza to be controlled by Israel, apparently referring to his assertion that he would not allow Israel to annex the West Bank.

Trump “wants Gaza to be controlled by the people who live there,” Vance said in response. “He wants the West Bank to be controlled by the people who live there, and he wants the terrorist networks that are around the Israelis to be dismantled so they can no longer pose a threat to Israel.”

Times of Israel staff contributed to this report.