Londoner O'Sullivan, a five-times world champion, scored two centuries on his way to a 6-4 win against Ricky Walden to equal the mark set by Scotland's now retired Stephen Hendry.
O'Sullivan, who can cue with both hands, is known for his rapid break-building and also holds the record for scoring televised maximums, a feat he has accomplished 13 times.
Hendry was not surprised his mark had been equalled.
"I am not bothered, it was a matter of time," he told the BBC.
The next highest total for century breaks among active players is John Higgins who has 565.
(Reporting by Martyn Herman, editing by Alan Baldwin)
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