Timeform expect Long Run to go through the current season unbeaten.
Nicky Henderson's Betfred Cheltenham Gold Cup hero returns to action in the Betfair Chase at Haydock on November 19th and is already even-money with the sponsors for that contest.
He has at least a stone in hand of his rivals on the Halifax-based firm's ratings and Timeform's Dan Barber said: "Long Run has the Betfair Chase at his mercy on our figures. Anyone looking for a chink in his armour may point to his defeat at Cheltenham first time up last season, but anything close to a repetition of his subsequent King George or Cheltenham Gold Cup performances will almost certainly be good enough.
"In fact, it's hard to see him getting beaten all season."
Weak betting
With the race not until November 19, and several possible contenders holding alternative engagements in the coming weeks, betting for the Grade One Betfair Chase at Haydock next month is predictably light.
Betfair spokesman Tony Calvin added: "Even money about Long Run would clearly look massive on the day, no matter what lined up against him. He obviously already has a top class and progressive profile and is rated at least 14lb superior to his likely rivals, headed by Kauto Star, according to Timeform.
"But the price simply underlines that long range, ante-post betting is effectively a double - the horse lining up at the start on the day, as well as winning."
Timeform ratings: 182 Long Run, 168 Kauto Star, Somersby, 166 What A Friend, 165p Diamond Harry 165 Albertas Run
To win the Betfair Chase - the sponsors bet: Evs Long Run, 9-2 Kauto Star, 10-1 Diamond Harry, 12-1 Captain Chris, Wishfull Thinking, 14-1 Time For Rupert, 16-1 Albertas Run, Somersby, 20-1 Kempes, Burton Port, What A Friend, 21-1 Master Minded, 24-1 Bostons Angel, 27-1 Denman, 29-1 Riverside Theatre, Jessies Dream, 33-1 Pandorama