v1.6.0

:Date: March 04, 2026

General Updates:

• Support for gest-api generators (https://gest-api.readthedocs.io). #1307

  • Support for any Xopt (v3.0+) and Optimas generators.
  • libEnsemble's APOSMM, gpCAM, and random sampling generators are supplied in gest-api format.
  • Support dictionary (Xopt-style) simulator functions.

• Simulation container support - Executor precedent accepts %LIBENSEMBLE_SIM_DIR% placeholder. #1672

Examples:

• Adding test for ibcdfo with jax. #1591
• Optimas/Xopt examples. #1620 / #1635
• Bayesian Optimization with Xopt tutorial / notebook.
• Tasmanian generators moved to community examples.

Dependencies:

• gest-api is now a required dependency. #1666
• Remove Pydantic v1 support and Balsam. #1573
• Python 3.14 supported. #1609

:Note:

• Tests were run on Linux and MacOS with Python versions 3.10, 3.11, 3.12, 3.13, 3.14
• Heterogeneous workflows tested on Aurora (ALCF) and Perlmutter (NERSC).

:Known Issues:

• See known issues section in the documentation.