BellKor’s Pragmatic Chaos wins NetFlix Prize (finally)!

What in the world is BellKor’s Pragmatic Chaos?

They just posted this on their page:

June 26, 2009: Today our team submitted our solution to the Netflix Prize, resulting in a score of .8558, which corresponds to an improvement over Netflix Cinematch algorithm of 10.05%.  This is the first submission in the competition to break the 10% barrier and sets off a 30 day period where all competitors are invited to submit their best and final solutions.”

Congratulations to the BellKor Pragmatic Chaos team!

Just in case you don’t know what the NetFlix Prize is:

“The Netflix Prize is an ongoing open competition for the best collaborative filtering algorithm that predicts user ratings for films, based on previous ratings. The competition is held by Netflix, an online DVD-rental service, and is opened for anyone (with some exceptions). The grand prize of $1,000,000 is reserved for the entry which bests Netflix’s own algorithm for predicting ratings by 10%.”

I’m sure a lot of people can learn a lot from the winning algorithms!

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