OpenMDAO GitHub

# Release Notes for OpenMDAO 3.45.1 Sept 10, 2026 OpenMDAO 3.45.1 contains bug fixes and performance improvements. Thanks to @johnjasa for some improvments to the way our Jax components handle unneeded partials can caching of matrix-free forward mode derivatives. OpenMDAO had bee

*********************************** # Release Notes for OpenMDAO 3.45.0 July 17, 2026 OpenMDAO 3.45.0 contains several improvements that users may find useful. ### Optimization updates On the optimization front, `Uno` is now available as an optimizer via pyOptSparseDriver. Uno is

June 01, 2026 OpenMDAO 3.44.0 introduces several powerful new options for optimization drivers, nonlinear solvers, and environment security. ### Driver Enhancements * `pymooDriver` integrates the [pymoo](https://pymoo.org/) suite of multi-objective optimization algorithms into Op

*********************************** # Release Notes for OpenMDAO 3.43.0 March 11, 2026 OpenMDAO 3.43.0 cleans up the way connections are managed under the hood. There's now a `python -m openmdao conn_graph` command that will graphically show connections/promotions for a system. T

*********************************** # Release Notes for OpenMDAO 3.42.0 January 08, 2026 OpenMDAO 3.42.0 is our first release for 2026. Happy New Year! The OpenMDAO repository now defines environments in files for use with [pixi](https://pixi.sh). These define the environments wi

*********************************** # Release Notes for OpenMDAO 3.40.0 August 19, 2025 OpenMDAO 3.40.0 adds several significant features - We've added a real time visualization tool for both optimization and analysis driver results via `python -m openmdao rtplot <script.py>`. -

*********************************** # Release Notes for OpenMDAO 3.40.0 August 19, 2025 OpenMDAO 3.40.0 adds several significant features - We've added a real time visualization tool for both optimization and analysis driver results via `python -m openmdao rtplot <script.py>`. -

## What's Changed * Incremented version to 3.38.1-dev by @swryan in https://github.com/OpenMDAO/OpenMDAO/pull/3484 * Updated the jax docs and updated JaxImplicitComponent to be consistent with JaxExplicitComponent by @naylor-b in https://github.com/OpenMDAO/OpenMDAO/pull/3489 * U

## What's Changed * Incremented version to 3.37.1-dev by @swryan in https://github.com/OpenMDAO/OpenMDAO/pull/3464 * Fixed an issue where Case._get_units was not retrieving units of aliases by @robfalck in https://github.com/OpenMDAO/OpenMDAO/pull/3463 * Added work_dir as an opti

## What's Changed * Incremented version to 3.36.1-dev by @swryan in https://github.com/OpenMDAO/OpenMDAO/pull/3418 * Fixed an issue with the dependency check for parallel derivative coloring by @naylor-b in https://github.com/OpenMDAO/OpenMDAO/pull/3419 * Updated Ubuntu images us

## What's Changed * Added timing to output from Problem checks by @swryan in https://github.com/OpenMDAO/OpenMDAO/pull/3371 * Update pyOptSparse citation by @ewu63 in https://github.com/OpenMDAO/OpenMDAO/pull/3380 * InputResidsComp cleanup by @robfalck in https://github.com/OpenM

## What's Changed * POEM 097 Implementation, Part 1 by @robfalck in https://github.com/OpenMDAO/OpenMDAO/pull/3287 * Fixed path to SNOPT output file in analysis error documentation by @swryan in https://github.com/OpenMDAO/OpenMDAO/pull/3301 * Update version/notes for 3.34.1 rele

## What's Changed * Fixed issue with ScipyOptimizeDriver introduced in the scaling report PR by @naylor-b in https://github.com/OpenMDAO/OpenMDAO/pull/3307 **Full Changelog**: https://github.com/OpenMDAO/OpenMDAO/compare/3.34.1...3.34.2

## What's Changed * Fixed issue with scaling report when there are linear-only dvs by @naylor-b in https://github.com/OpenMDAO/OpenMDAO/pull/3302 **Full Changelog**: https://github.com/OpenMDAO/OpenMDAO/compare/3.34.0...3.34.1

## What's Changed * Optimizers now keep track of design vars that impact linear constraints and nonlinear responses separately. by @naylor-b in https://github.com/OpenMDAO/OpenMDAO/pull/3275 * Fix for test_scaffold test that doesn't clean up site-packages installs on some machine

## What's Changed * Incremented version to 3.32.1-dev by @swryan in https://github.com/OpenMDAO/OpenMDAO/pull/3222 * Moved get_free_port function to utils directory file by @hschilling in https://github.com/OpenMDAO/OpenMDAO/pull/3224 * Added minimum version requirements to addre