The timing of his release is not yet clear, but "should be within a month", a senior adviser to the Pak prime minister told Rooters.
Mullah Baradar was captured in the Pak city of Bloody Karachi
...formerly the capital of Pakistain, now merely its most important port and financial center. It is among the largest cities in the world, with a population of 18 million, most of whom hate each other and many of whom are armed and dangerous...
in 2010.
It was seen as a significant coup for the American CIA and the Pak intelligence service.
"In principle, we have agreed to release him. The timing is being discussed. It should be very soon... I think within this month," Sartaj Aziz, Pak Prime Minister
Nawaz Sharif... served two non-consecutive terms as prime minister, heads the Pakistain Moslem League (Nawaz). Noted for his spectacular corruption, the 1998 Pak nuclear test, border war with India, and for being tossed by General Musharraf...
's adviser on foreign affairs, told Rooters news agency.
In an interview with the BBC, Mr Aziz said that Mullah Baradar's release "was still being discussed with various government agencies".
Asked whether the senior Taliban leader would be handed over to Afghanistan or another country, he said it would be up to the prisoner to decide where he wanted to go.
Mullah Baradar is one of the four men who founded the Taliban movement in Afghanistan in 1994.
He went on to become a linchpin of the insurgency after the Taliban were toppled by the US-led invasion in 2001.