"An agreement was reached," a government source told AFP, with Finance Minister Euclid Tsakalotos telling reporters: "We are very close... There are a couple of very small details remaining on prior actions."
A finance ministry source told AFP that the remaining details "do not affect the main body of the agreement."
The Athens stock market opened up 1.64 per cent on today after three straight days of gains.
In the final stretch, Tsakalotos and Economy Minister Yiorgos Stathakis spent nearly 22 hours talking to senior representatives from the European Union, the European Central Bank, the International Monetary Fund and the European Stability Mechanism to finalise the list of new reforms required of the Greek government in exchange for a lifeline of up to 86 billion euros (USD 94 billion).
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State broadcaster ERT today said Prime Minister Alexis Tsipras had spoken to German Chancellor Angela Merkel, French President Francois Hollande, European Commission chief Jean-Claude Juncker and European Parliament chairman Martin Schultz on the accord.
"Today the deal will be submitted to parliament," Christos Staikos, a member of the ruling Syriza party, told the station.
The chamber is expected to vote on the accord on Thursday, and eurozone finance ministers could be asked to approve it the next day.
Athens committed to a primary deficit of 0.25 per cent of output in 2015, and a surplus in 2016, meaning that no new fiscal measures will be necessary until then, the source said.
In 2016 the primary surplus -- the balance not including debt service -- will be 0.5 per cent, followed by 1.75 per cent in 2017 and 3.5 per cent in 2018, the source added.
These include energy market deregulation, changes to tonnage tax for shipping firms, price cuts in generic drugs, a review of the social welfare system, phasing out early retirement, and implementing market reforms proposed by the Organisation for Economic Cooperation and Development, it said.