Speaking at the start of a cabinet meeting, Netanyahu said the deal was the "largest assistance agreement that the United States has ever provided to any country in its history".
He said it "proves the depth of the relationship, and the strength of relations, between Israel and the United States."
Netanyahu hit back at political opponents who argue the country should have received a larger package in compensation for the new threats Israel says it faces due to the nuclear accord with its arch-foe Iran.
President Barack Obama's administration was angered by the address, which it saw as interference in the country's internal affairs by a foreign leader.
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For Netanyahu's critics, he should have moved on from his campaign against the accord sooner and quickly begun negotiations on the new decade-long defence aid package.
Former prime minister Ehud Barak was among those criticising Netanyahu, saying his "reckless conduct has... undermined Israel's security."
Labour opposition lawmaker Shelly Yachimovich said that "Netanyahu himself told heads of the security establishment to count on USD 5-6 billion a year, of which USD 3.8 (billion) are left."
"This is a result of arrogant conduct, failing to read the map, and campaign considerations," she wrote on Twitter.
On Sunday, Netanyahu said "I would like to make it clear: we were never offered more.
He said such comments also showed "ingratitude to our greatest and best friend, the United States."
The United States and Israel signed the deal in Washington on Wednesday.
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