Dear users and developers,

Thanks a lot for all the active checking of the release-candidate. Some of the tests have indeed helped to find a regression and other things. We thereby where able to fix these and the updated release candidate NEST 3.10-rc2 is now available. The experience we gained is included into our test suite, but of course there might still be issues that we haven't encountered yet.

Please feel free to try out the new candidate and let us know if there is anything that should stop us from releasing.

Let us know about your experience! We'd be happy to hear where we can improve, and even happier to hear if you're happy.

If everything goes well, we're looking forward to the full release in the coming days and will announce it accordingly.

Best,
Dennis

https://github.com/nest/nest-simulator/releases/tag/v3.10_rc2

On 2026-04-21 17:46, Dennis Terhorst wrote:

Dear users and developers,

in preparation for the NEST 3.10 release, the pre-release version NEST 3.10-rc1 is now available for testing.

This long-awaited release changes the inner structure by removing the legacy simulation language interface (SLI) layer and promoting PyNEST as primary user interface. People already using NEST via Python will benefit from the cleaner function calls, without any changes necessary to their code. Depending on the model setup, instantiation of large models may be noticeably faster.

Additionally to the traditional install methods, the new version will be available in an unoptimized, non-MPI version via "pip install nest-simulator" once the release is complete. Due to a quirk in the process the pre-release version however is currently not installable with the usual "--pre" flag. If you want to test the pre-release version use `pip install nest-simulator==3.10rc1` as a workaround for now (we "yanked" the rc-version from PyPI).

Note that pre-releases are not fully tested and will be removed after the actual release is complete, so don't base your work on it.

Let us know about your experience! We'd be happy to hear where we can improve, and even happier to hear if you're happy.

If everything goes well, we're looking forward to the full release in the coming days and will announce it accordingly.

Best,
Dennis

https://github.com/nest/nest-simulator/releases/tag/v3.10_rc1

-- 
Dipl.-Phys. Dennis Terhorst
Coordinator Software Development

Institute for Advanced Simulation (IAS-6)
Computational and Systems Neuroscience
&
JARA-Institute Brain Structure-Function Relationships (INM-10)
Institute of Neuroscience and Medicine

Jülich Research Center, Member of the Helmholz Association
52425 Jülich, Germany

http://www.csn.fz-juelich.de/

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Forschungszentrum Jülich GmbH
52425 Jülich
Sitz der Gesellschaft: Jülich
Eingetragen im Handelsregister des Amtsgerichts Düren Nr. HR B 3498
Vorsitzender des Aufsichtsrats: MinDir Stefan Müller
Geschäftsführung: Prof. Dr. Astrid Lambrecht (Vorsitzende),
Dr. Stephanie Bauer (stellvertretende Vorsitzende),
Prof. Dr. Ir. Pieter Jansens, Prof. Dr. Laurens Kuipers
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-- 
Dipl.-Phys. Dennis Terhorst
Coordinator Software Development

Institute for Advanced Simulation (IAS-6)
Computational and Systems Neuroscience
&
JARA-Institute Brain Structure-Function Relationships (INM-10)
Institute of Neuroscience and Medicine

Jülich Research Center, Member of the Helmholz Association
52425 Jülich, Germany

http://www.csn.fz-juelich.de/

---------------------------------------------------------------------------------------------
Forschungszentrum Jülich GmbH
52425 Jülich
Sitz der Gesellschaft: Jülich
Eingetragen im Handelsregister des Amtsgerichts Düren Nr. HR B 3498
Vorsitzender des Aufsichtsrats: MinDir Stefan Müller
Geschäftsführung: Prof. Dr. Astrid Lambrecht (Vorsitzende),
Dr. Stephanie Bauer (stellvertretende Vorsitzende),
Prof. Dr. Ir. Pieter Jansens, Prof. Dr. Laurens Kuipers
---------------------------------------------------------------------------------------------