Q-Chem 6.3.1 Is Now Available!
September 23rd, 2025

Q-Chem is pleased to introduce our latest release, Q-Chem 6.3.1. It includes several bugfixes and improvements to the recent 6.3 release! For a full list of updates, fixes, and resolved issues, please review the full 6.3 release log here.
Any of our customers who have purchased Q-Chem 6.3 already can upgrade to Q-Chem 6.3.1 for free! Don't forget that Q-Chem is also now available on AWS; check out our Q-Cloud product page here for more information.
If you want to try Q-Chem 6.3.1 yourself, you can request a fully-featured month-long demo license here.