Unbeaten Frankel enhanced his reputation as one of the greatest horses in history by easily taking the Juddmonte International at York.
"That really is an astonishing performance. I think Tom Queally patted his forehead almost in mock disbelief - 13 wins out of 13 races, history made by Frankel.
"He eased to the front and it was over in a blink of an eye. The Frankel fever crowds have really seen something thrilling today, and it does seem a pity that it's very likely he will only race once more."
It takes the Sir Henry Cecil-trained colt's record to 13 wins from 13 races.
Despite stepping up in distance to 10 furlongs for the first time, the world's top-rated horse (1-10) powered through the field to take a record eighth consecutive Group One victory.
The Tom Queally-ridden four-year-old won the £725,000 race by seven lengths.
Frankel has now surpassed Rock of Gibraltar's mark of seven Group One wins in a row.
Cecil, who has battled stomach cancer since 2006, was at York to see his prized asset extend his perfect record.
"It's fantastic and it's great for Yorkshire, they're very supportive of racing and deserve to see him. [It helped me feel] 20 years better," he said.
Frankel's lucky 13
- 13 August 2010:
European Breeders' Fund Maiden Stakes, Newmarket
- 10 September 2010:
Frank Whittle Partnership Condition Stakes, Doncaster
- 25 September 2010:
Juddmonte Royal Lodge Stakes, Ascot
- 16 October 2010:
Dubai Dewhurst Stakes, Newmarket
- 16 April 2011:
Greenham Stakes, Newbury
- 30 April 2011:
2000 Guineas, Newmarket
- 14 June 2011:
St James's Palace Stakes, Ascot
- 17 July 2011:
Sussex Stakes, Goodwood
- 15 October 2011:
Queen Elizabeth II Stakes, Ascot
- 19 May 2012:
JLT Lockinge Stakes, Newbury
- 19 June 2012:
Queen Anne Stakes, Ascot
- 1 August 2012:
Sussex Stakes, Goodwood
- 22 August 2012:
Juddmonte International Stakes, York
Godolphin's Farhh (10-1) finished in second place, ahead of Ballydoyle's St Nicholas Abbey (5-1) in third.
Having been slowest out of the gate and then finding himself caught in the middle of the field in the opening stages, Frankel came past St Nicholas Abbey on the near side with two furlongs to go and then eased to victory in the Ebor Festival's showpiece race, sponsored by Frankel's owner Khalid Abdullah.
"Every man and his dog had his penny's worth as to where he should run and what he should do, but to run him in the owner's race and to go and win 13 from 13 speaks for itself," said Queally, who has mounted the Newmarket horse to each of his remarkable wins.
Queally said that he was prepared for the two Ballydoyle horses Robin Hood and Windsor Palace acting as pacemakers for St Nicholas Abbey, and was grateful to Eddie Ahern for doing the same for Frankel on stable-mate Bullet Train.
"I suspected they would go a good gallop, but we had a plan in place. Eddie Ahern did a good job on Bullet Train and it panned out nicely," he said.
Uncertainty remains over how many more outings Cecil will give Frankel, but a career finale at Ascot's British Champions Day in October is a distinct possibility.