It was created in 1858 as the first of two races titled the Prix Biennal. The second, for horses aged four-years-old or above, was introduced in 1859. Both races were re-named in 1940 in memory of Jean Prat, a leading French racehorse owner and breeder who died earlier that year. The version for older horses was given a new title in 1985, the Prix Vicomtesse Vigier, while this race retained the title Prix Jean Prat.
From its launch until 1966 the race took place at Longchamp. It was then moved to Chantilly, where it remained until 1985. A second spell at Longchamp began the following year and continued until the race returned to Chantilly in 1995.
Originally contested over 2,000 metres, the race's distance was cut to 1,850 metres in 1962 and to 1,800 metres in 1967. The present distance was introduced in 2005.
In its earlier years the race took place in April and served as a trial for the Prix du Jockey Club. From 1961 until 2004 it was run in late May or early June and seen as a possible intermediate race between the Poule d'Essai des Poulains and the Grand Prix de Paris. Since 2005 it has taken place in early July.
The Prix Jean Prat was promoted to Group 1 status in 1985 having been previously classed as a Group 2 race.
| Year|| Winner|| Jockey|| Trainer|| Owner|| Time|
|1980||Night Alert||Lester Piggott||Vincent O'Brien||Robert Sangster||1:48.2|
|1981||Cresta Rider||Philippe Paquet||François Boutin||Stavros Niarchos||1:50.4|
|1982||Melyno||Yves Saint-Martin||François Mathet||Stavros Niarchos||1:46.1|
|1983||Ginger Brink||Yves Saint-Martin||Robert Collet||Albert Yank||1:50.9|
|1984||Mendez||Cash Asmussen||François Boutin||Philippe Niarchos||1:52.8|
|1985||Baillamont||Cash Asmussen||François Boutin||Stavros Niarchos||1:54.6|
|1986||Magical Wonder||Cash Asmussen||Georges Mikhalidès||Mahmoud Fustok||1:51.8|
|1987||Risk Me||Tony Cruz||Paul Kelleway||Lewis Norris||1:56.4|
|1988||Lapierre||Steve Cauthen||Clive Brittain||Mrs J. M. Khan||1:54.0|
|1989||Local Talent||Cash Asmussen||André Fabre||Sheikh Mohammed||1:59.5|
|1990||Priolo||Gérald Mossé||François Boutin||Ecurie Skymarc Farm||1:53.7|
|1991||Sillery||Dominique Boeuf||Criquette Head||Ghislaine Head||1:51.3|
|1992||Kitwood||Steve Cauthen||André Fabre||Sheikh Mohammed||1:58.0|
|1993||Le Balafre||Olivier Peslier||Nicolas Clément||Joseph de Lastours||1:53.1|
|1994||Millkom||Jean-René Dubosc||Jean-Claude Rouget||Jean-Claude Gour||1:56.0|
|1995||Torrential||Frankie Dettori||John Gosden||Sheikh Mohammed||1:55.9|
|1996||Le Triton||Freddy Head||Criquette Head||Maktoum Al Maktoum||1:48.6|
|1997||Starborough||Frankie Dettori||David Loder||Sheikh Mohammed||1:51.7|
|1998||Almutawakel||Frankie Dettori||Saeed bin Suroor||Godolphin||1:51.9|
|1999||Golden Snake||Michael Hills||Barry Hills||Mohamed Obaida||1:54.5|
|2000||Suances||Gérald Mossé||M. Delcher Sánchez||Jed Cohen||1:53.4|
|2001||Olden Times||Pat Eddery||John Dunlop||Prince A. A. Faisal||1:48.1|
|2002||Rouvres||Olivier Doleuze||Criquette Head-Maarek||Alec Head||1:46.5|
|2003||Vespone||Christophe Lemaire||Nicolas Clément||Ecurie Mister Ess A S||1:47.1|
|2004||Bago||Thierry Gillet||Jonathan Pease||Niarchos Family||1:46.6|
|2005||Turtle Bowl||Olivier Peslier||François Rohaut||Berend van Dalfsen||1:36.1|
|2006||Stormy River||Thierry Thulliez||Nicolas Clément||Ecurie Mister Ess A S||1:37.8|
|2007||Lawman||Olivier Peslier||Jean-Marie Béguigné||C. Marzocco & E. Ciampi||1:41.2|
|2008||Tamayuz||Davy Bonilla||Freddy Head||Hamdan Al Maktoum||1:37.6|