diff --git a/pages/whats-new.mdx b/pages/whats-new.mdx
index 759f202..e3e019e 100644
--- a/pages/whats-new.mdx
+++ b/pages/whats-new.mdx
@@ -8,6 +8,18 @@ import Image from 'next/image';
 
 # What's new in MOSTLY AI
 
+## 5.10.0
+
+_January 12th, 2026_
+
+### Generator Constraints
+
+- {/* MSD-2306 */} Generators now support **Constraints** with initial support for **Inequality** and **FixedCombinations** (currently only available via [Assistant](/assistant) & [Synthetic Data SDK](/python-sdk))
+
+### Upstream dependencies
+
+- Upgraded [Synthetic Data SDK](https://github.com/mostly-ai/mostlyai) to `5.10.1`, [Synthetic Data Engine](https://github.com/mostly-ai/mostlyai-engine) to `2.4.0` (and with that upgraded to PyTorch 2.9).
+
 ## 5.9.1
 
 ### Footer and full page view in shared artifacts