China, Africa, India, Brazil and the US reached a weak consensus climate change agreement based on the three key concerns of transparency, mitigation and finance.

AAP is reporting that wealthy and key developing nations have agreed to limit global warming to two degrees Celsius, according to a US official, with each country required to list the actions they would take to cut global warming pollution by specific amounts.

AFP is reporting a European diplomat as saying the pact includes an agreement to put off until next month a decision on targets for reducing carbon emissions by 2020.

However even US President, Barack Obama, says the agreement is "not sufficient" to get emissions to where they need to be by 2050.

But while news was filtering out of the deal between the party of five, the Australian Government was believed to still be ironing out details of an accord between a special group of 25.

There was no sign of Australia, or Prime Minister and so-called "friend of the chair", Kevin Rudd, in the final meetings which helped cut the deal, and while reports of a deal were coming through from other nations, the Australian press team was unable to confirm any details of the terms or whether the Prime Minister would be available for comment.

There was also no confirmation whether that group had given authority or backing to Barack Obama to announce the deal or whether they endorsed what was in it.

Meanwhile the head of the G77-nations group, Sudanese diplomat Lumumba Di-Aping, has slammed the so-called agreement.

He said "a deal cannot be super-imposed on the parties" and said for a deal to be reached all parties needed to be a signatory.

He said Sudan would not be signing up to the deal being reported.

It's believed Australia is pleased with "a" deal, but there has been no word what role, if any, Australia played behind the high-profile group of five deal.

It would appear though that Australia and Europe were not part of the breakthrough talks.

There's been no sign of the final texts yet but Mr Obama said the deal between the five nations signalled in a "new era of international action" and would tie countries to adding concrete commitments to the appendix in an accord, which will probably be voted on in the early hours of Saturday morning, Copenhagen time.

More details to come.