The Apache OpenNLP team is pleased to announce the release of Apache OpenNLP 2.5.10.
The Apache OpenNLP library is a machine learning based toolkit for the processing of natural language text.
It supports the most common NLP tasks, such as tokenization, sentence segmentation, part-of-speech tagging, named entity extraction, chunking, parsing, and coreference resolution.
Apache OpenNLP 2.5.10 binary and source distributions are available for download from our download page.
The OpenNLP library is distributed by Maven Central as well. See the Maven dependency page for more details.
This is a maintenance release on the 2.x line. It backports the fixes shipped with (upcoming) 3.0.0-M4 and refreshes several dependencies.
This release ships four bug fixes for: OPENNLP-1826, OPENNLP-1836, OPENNLP-1839, and OPENNLP-1840
OpenNLP now supports Roberta-based models (OPENNLP-1518)
A problem with unsupported XML parser security options was addressed (OPENNLP-1835)
Some minor tasks have been completed
Update log4j2 to 2.26.0 (OPENNLP-1817)
Update ONNX runtime to 1.26.0 (OPENNLP-1822)
Update Slf4j to 2.0.18 (OPENNLP-1831)
Update Morfologik to 2.2.0 (OPENNLP-1848)
For further details, check the full list of changes via the project’s issue tracker.
--The Apache OpenNLP Team
24 June 2026