GroupLens Research has collected and made available rating data sets from the MovieLens web site (http://movielens.org). The data sets were collected over various periods of time, depending on the size of the set. Before using these data sets, please review their README files for the usage licenses and other details.

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recommended for new research

MovieLens 20M Dataset

Stable benchmark dataset. 20 million ratings and 465,000 tag applications applied to 27,000 movies by 138,000 users. Includes tag genome data with 12 million relevance scores across 1,100 tags. Released 4/2015; updated 10/2016 to update links.csv and add tag genome data.

Permalink: http://grouplens.org/datasets/movielens/20m/


recommended for education and development

MovieLens Latest Datasets

These datasets will change over time, and are not appropriate for reporting research results. We will keep the download links stable for automated downloads. We will not archive or make available previously released versions.

Small: 100,000 ratings and 1,300 tag applications applied to 9,000 movies by 700 users. Last updated 10/2016.

Full: 24,000,000 ratings and 670,000 tag applications applied to 40,000 movies by 260,000 users. Includes tag genome data with 12 million relevance scores across 1,100 tags. Last updated 10/2016.

Permalink: http://grouplens.org/datasets/movielens/latest/


older datasets

MovieLens 100K Dataset

Stable benchmark dataset. 100,000 ratings from 1000 users on 1700 movies. Released 4/1998.

Permalink: http://grouplens.org/datasets/movielens/100k/

MovieLens 1M Dataset

Stable benchmark dataset. 1 million ratings from 6000 users on 4000 movies. Released 2/2003.

Permalink: http://grouplens.org/datasets/movielens/1m/

MovieLens 10M Dataset

Stable benchmark dataset. 10 million ratings and 100,000 tag applications applied to 10,000 movies by 72,000 users. Released 1/2009.

Permalink: http://grouplens.org/datasets/movielens/10m/

MovieLens Tag Genome Dataset

11 million computed tag-movie relevance scores from a pool of 1,100 tags applied to 10,000 movies. Released 3/2014.

Also consider using the MovieLens 20M or latest datasets, which also contain (more recent) tag genome data.

Permalink: http://grouplens.org/datasets/movielens/tag-genome/