# PyStan 3.1 is released

**URL:** <https://discourse.mc-stan.org/t/pystan-3-1-is-released/22843>\
**Category:** Announcements\
**Tags:** python\
**Created:** [June 3, 2021, 5:16pm UTC](https://discourse.mc-stan.org/t/pystan-3-1-is-released/22843 "2021-06-03T17:16:04Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![ariddell](https://avatars.discourse-cdn.com/v4/letter/a/57b2e6/32.png) [@ariddell](https://discourse.mc-stan.org/u/ariddell)\
**Post date:** [June 3, 2021, 5:16pm UTC](https://discourse.mc-stan.org/t/pystan-3-1-is-released/22843/1 "2021-06-03T17:16:04Z")

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PyStan 3.1 is available on PyPI.

This release features the newest version of Stan, version 2.27.

For those of you new to PyStan 3, I encourage you to check out the detailed 3.0 release announcement, [PyStan 3.0 is released](https://discourse.mc-stan.org/t/pystan-3-0-is-released/21500)