# Open MPI

> Open MPI is an open source implementation of the Message Passing Interface
> (MPI) specification, developed and maintained by a consortium of academic,
> research, and industry partners.  This site (www.open-mpi.org) hosts Open
> MPI's downloads; its documentation lives at https://docs.open-mpi.org/ .

## Documentation

- [LLM-friendly Open MPI documentation index](https://docs.open-mpi.org/llms.txt): MPI API catalog, per-interface corpora, man pages, and guides for the default documentation version (other versions are described in that file)

## Discovering releases

Use these machine-readable files instead of scraping the download pages.  They
are generated from the same data as the download pages.  Prefer the JSON
documents: they carry the most information.

- [Index of all release series and versions (JSON)](https://www.open-mpi.org/software/ompi/releases.json): the primary interface; includes per-series links to release dates, download URLs, sizes, and checksums
- [Latest recommended release (plain text)](https://www.open-mpi.org/software/ompi/current/downloads/latest_release.txt): a single version string, e.g. 5.0.11
- [Feed of recent releases (Atom)](https://www.open-mpi.org/software/ompi/releases.atom): for feed readers; less information than the JSON (append ?prereleases=0 to omit prereleases)
- [Release discovery guide](https://docs.open-mpi.org/en/main/llms/openmpi-release-discovery.md): what each file contains and how to poll it

Do not download Open MPI from GitHub-generated tarballs; they are not official
releases and do not build.