Afghanistan's Ghani urges Biden to up pressure on Taliban
"The United States and NATO must take a very strong stand on the conditions-based approach," Ghani said in an online address to the Aspen Security Forum.
"They signed an agreement; that agreement now needs to be implemented."
Even though Taliban and Afghan government negotiators opened peace talks in Doha last year, violence in Afghanistan has soared.
Ghani said the Taliban must admit to attacking government forces and conducting a string of assassinations of public figures.
"Instead, violence has peaked," he said.
And rather than pursuing peace talks in good faith, "the Taliban are finding one excuse after another not to meet."
Ghani said he spoke with new US Secretary of State Antony Blinken on Thursday and was assured that President Joe Biden's administration would review matters by sending a new team to Afghanistan, and would consult more closely with Kabul.
"We couldn't be more pleased with the early focused, systematic attention and a dialog between two partners that have mutually sacrificed and have a mutual interest," he said.
"Now, robust diplomacy and a stand on conditions-based approaches will enable us all hopefully to resume meaningful discussion," he added.
The United States has about 2,500 troops in Afghanistan, down from close to 13,000 a year ago.
In the Trump administration's withdrawal deal with the Taliban, the US was supposed to pull all troops out by May 2021 in return for security pledges from the insurgents.
"NATO without US enablers cannot continue its mission," he said.
If the "Taliban realise that they can prevail through violence, they will not let go," he added.
"A combination of presence, plus diplomacy, bringing US tools of power in a concentrated manner.... would be extremely crucial to our success."