Frankel achieved a rating of 136 in the World Thoroughbred Rankings revealed in London today.
Henry Cecil's unbeaten colt enjoyed a spectacular 2011, recording a jaw-dropping six-length success in the Qipco 2000 Guineas under Tom Queally.
Further Group One glory came his way in the St James's Palace Stakes and Sussex Stakes, with his season ending as it began with a brilliant win in the Queen Elizabeth II Stakes on the inaugural British Champions Day.
His mark, deemed to have come when beating Canford Cliffs in the Sussex, puts him on a par with Sea The Stars, winner of the Guineas, Derby and Prix de l'Arc de Triomphe in 2009.
Australian sensation Black Caviar was given a figure of 132, 4lb clear of Champion Stakes winner Cirrus Des Aigles and Arc heroine Danedream.
Aidan O'Brien's Camelot (119) was, alongside French raider Dabirsim, named joint-top-rated juvenile colt in Europe.
Ballydoyle stablemate Maybe (116) was crowned joint-top-rated filly in Europe along with the John Gosden-trained Elusive Kate.