Anthony Albanese rejects suggestions it could cost Australia more than $2 billion to host a major climate summit.

The prime minister pushed back when asked about the apparent price tag, floated in multiple media reports.

"Commentary is commentary," Mr Albanese told reporters on Sunday.

"People are plucking figures, from who?"

Australia and Turkey are jostling for the hosting rights of the United Nations conference in 2026.

Australia's bid has been presented as a partnership with Pacific neighbours.

Climate change was wreaking havoc across the nation and wider region and urgent action was required, Mr Albanese said.

"Our Pacific family are under threat. Their very existence," he said.

"And so we need to be a part of acting on climate change.

"We need to make sure that we act domest

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