# OpenTURNS 1.21 is here

**URL:** <https://openturns.discourse.group/t/openturns-1-21-is-here/300>\
**Category:** Announcements\
**Created:** [June 21, 2023, 12:24pm UTC](https://openturns.discourse.group/t/openturns-1-21-is-here/300 "2023-06-21T12:24:34Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![schueller](https://yyz2.discourse-cdn.com/free1/user_avatar/openturns.discourse.group/schueller/32/3_2.png) [@schueller](https://openturns.discourse.group/u/schueller)\
**Post date:** [June 21, 2023, 12:24pm UTC](https://openturns.discourse.group/t/openturns-1-21-is-here/300/1 "2023-06-21T12:24:34Z")

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Hello everyone,

OpenTURNS 1.21 is out now with the features announced for the RC1, see our previous post:

> [@Version 1.21 RC1 available](https://openturns.discourse.group/t/version-1-21-rc1-available/292):
>
> Hello everyone, We are happy to announce the availability of OpenTURNS 1.21 RC1 with: The Smolyak nested experiment dedicated to quadrature: [Design of experiments — OpenTURNS 1.21rc1 documentation](http://openturns.github.io/openturns/1.21/auto_reliability_sensitivity/design_of_experiments) /plot\_smolyak\_quadrature.html The Cross-Entropy Importance Sampling simulation algorithms for reliability: [Cross Entropy Importance Sampling — OpenTURNS 1.21rc1 documentation](http://openturns.github.io/openturns/1.21/auto_reliability_sensitivity/reliability/plot_crossentropy.html) New efficient chaos base classes for integration & least squares (full) usage: [LeastSquaresExpansion — OpenTURNS 1.21rc1…](http://openturns.github.io/openturns/1.21/user_manual/response_surface/_generated/openturns.experimental.LeastSquaresExpansion.html)

Thank you for the feedback during this long RC phase which saw some GEV improvements and additional bugfixes, see the definitive list of changes here:

> <https://github.com/openturns/openturns/blob/v1.21/ChangeLog>

This time pip binaries are available as well as conda ones (Python [3.8, 3.11]), and on mac we support both Intel and Apple silicon processors (x86\_64 and arm64).

For this release we also have Linux packages (.deb, .rpm) for:

- Debian 11/12
- Ubuntu 20/22
- Fedora 37/38
- CentOS 8
- OpenSUSE 15.4
- Mageia 8

See you soon!