---
myst:
  html_meta:
    "description": "eOn v3.3.1: the client builds again. Nudged elastic band, basin hopping and saddle search fixes, plus the xtsci optimizer engine."
    "keywords": "eOn v3.3.1, NEB, xtsci, basin hopping, saddle search, release"
---

## [v3.3.1] - 2026-09-27

Patch on `v3.3.0`. The `v3.3.0` tag does not compile the client; this
one does. It also carries 92 fixes, most of them in the nudged elastic
band (NEB), basin hopping, the saddle searches and the thermostats. It
adds the xtsci optimizer engine.

```{toctree}
:maxdepth: 2
:caption: Release notes

release-notes
```