We're excited to release Manticore Search 13.2.3 , the result of our work throughout June 2025. This version focuses on making Vector Search faster, more memory-efficient, and better suited for large-scale data, while also improving compatibility and stability.

Vector Search: Now Smarter and More Efficient

Since this release, Manticore Search supports quantized KNN vector search , giving you:

• Much faster indexing of float vector data
• Significantly lower RAM usage due to quantization
• Nearly the same accuracy thanks to oversampling and rescoring

This is especially important when working with large datasets — for example in image search, recommendation systems, or AI-powered search — where indexing performance and memory efficiency are crucial.

Breaking Changes — What You Need to Know

This release includes some internal changes that may affect compatibility if you're using float_vector attributes:

• If you don’t use float_vector, you’re good — no action needed.
• If you do use float_vector, your existing data will be read just fine by the new version. However:
  • If you make changes to your data (e.g. insert or update documents), you may not be able to downgrade to an older version afterward.
• The internal API between Manticore Search and the Manticore Columnar Library (MCL) has changed.
  If you follow the official installation instructions , both packages will be updated automatically — no extra steps needed.

Relevant changes:

• v13.0.0: Updated KNN API to allow empty float_vector values
• v12.0.0: Fixed incorrect row ID mapping during KNN index training and building
• v11.0.0: Added quantization, oversampling, and rescoring

Improvements and Fixes

This release also includes:

• Fixes for compatibility with tools like mysqldump
• Improved stability in Fuzzy Search and Vector Search queries
• RHEL 10 support
• Better logging and container behavior

We’ve made over 20 bug fixes in total. For full details, see the Changelog .

Ready to Upgrade?

To benefit from the latest improvements, just follow the installation instructions — both Manticore Search and MCL will be updated automatically.

Need help or want to share feedback?

• Join us on Slack
• Visit the Forum
• Report issues or suggest features on GitHub
• Or email us at [email protected]