Durant suffered the injury in the Riders' season-opening loss to Winnipeg.
But in a rare bit of good news for the struggling Roughriders, the 2013 Grey Cup-winning quarterback said his recovery is ahead of schedule.
"I'm feeling good. If I can stay healthy, I still feel like I'm the best quarterback in this league and I'm out to prove that,'' Durant told reporters Monday.
He said the next move is to work on more explosive exercises, such as sprinting. He plans to spend the off-season working out in Regina.
The 33-year-old shrugged off doubts about his future.
"Everyone that I've seen go down from an Achilles has come back and is still a productive player, so there's no question that I'll be in that same boat,'' he said.
"But like I said, I won't be the same player, I'll be a lot better.''
Durant missed part of the 2014 season after suffering a torn tendon in the elbow of his throwing arm that September. He had surgery to repair it and in April was looking forward to getting back on the gridiron.
Watching from the sidelines again has been tough.
"It's been crushing just watching the team go through this each and every week and not being able to help,'' said Durant.
"I really think that I could really help this team succeed this year, so it's sucks watching it. But it's a learning experience for me. It humbled me and it just has me fired up getting ready for next year.''
The Riders have also struggled to a dismal 2-15 record this season without Durant.
Injuries hit the team hard.
After Durant went down, backup quarterback Kevin Glenn stepped in. Then Glenn was felled by a torn pectoral muscle in Saskatchewan's loss to the Hamilton Tiger-Cats on July 26. Several other key players are out too, including defensive back Terrell Maze and linebacker Shea Emry.
In August, the Roughriders fired head coach Corey Chamblin and vice president of football operations and general manager Brendan Taman.
Durant said it will be a team effort to rebuild for next season, but he believes he's one of the key pieces.
"I'm the guy. I mean I feel like I'm the guy that could take this team to the next level, get this team out of this slump. You know, I'm confident in my abilities.''